To: TXCO Resources, Inc.
To:         
      TXCO
      Resources, Inc.
       
      ▇▇▇ ▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇., ▇▇▇▇▇ ▇▇▇
        San
      Antonio, TX 78258
        Attention:
      ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, President 
    From:     
      Capital
      Ventures International 
    By:
      Heights Capital Management, Inc., Its Authorized Agent
    ▇▇▇
      ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇
    San
      Francisco, CA 94111
    Attention:
      ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
    Ladies
      and Gentlemen:
    The
      purpose of this letter agreement (this “Confirmation”)
      is to
      confirm the terms and conditions of the Transaction entered into between Capital
      Ventures International (“Party
      A”)
      and
      TXCO Resources, Inc. (“Party
      B”)
      on the
      Trade Date specified below (the “Transaction”).
      This
      Confirmation constitutes a “Confirmation” as referred to in the Agreement
      specified below. 
    | 1. | This
                Confirmation is subject to, and incorporates, the definitions and
                provisions of the 2000 ISDA Definitions (including the Annex thereto)
                (the
                “2000
                Definitions”)
                and the definitions and provisions of the 2002 ISDA Equity Derivatives
                Definitions (the “Equity
                Definitions”,
                and together with the 2000 Definitions, the “Definitions”),
                in each case as published by the International Swaps and Derivatives
                Association, Inc. (“ISDA”).
                In the event of any inconsistency between the 2000 Definitions and
                the
                Equity Definitions, the Equity Definitions will govern.
                 | 
This
      Confirmation evidences a complete and binding agreement between Party A and
      Party B as to the terms of the Transaction to which this Confirmation relates.
      The parties may agree to negotiate an agreement in the form of the ISDA Form.
      Until any such time, this Confirmation, together with all other documents
      referring to the ISDA Form (each a “Confirmation”)
      confirming Transactions entered into between us (notwithstanding anything to
      the
      contrary in a Confirmation), shall supplement, form a part of, and be subject
      to
      an agreement in the form of the ISDA Form as if we had executed an agreement
      in
      such form (but without any election in the Schedule) on the Trade Date of the
      first such Transaction between us. This Confirmation shall be subject to an
      agreement (the “Agreement”)
      in the
      form of the 2002 ISDA Master Agreement (the “ISDA
      Form”)
      as if
      Party A and Party B had executed an agreement in such form (without any Schedule
      but with the elections set forth in this Confirmation, it being understood
      the
“Cross-Default” shall not apply to this Transaction). For the avoidance of
      doubt, the Transaction shall be the only transaction under the
      Agreement.
    All
      provisions contained in, or incorporated by reference to, the Agreement will
      govern this Confirmation except as expressly modified herein. In the event
      of
      any inconsistency between this Confirmation and either the Definitions or the
      Agreement, this Confirmation shall govern.
    | 2. | The
                            general terms relating to the Transaction are as
                            follows: | 
| Option
                Style: | European,
                subject to the automatic early exercise provisions described
                below. | ||
| Option
                Seller: | Party
                A | ||
| Option
                Buyer: | Party
                B | ||
| Option
                Multiple Exercise: | Not
                Applicable | ||
| Strike
                Price: | $17.36 | ||
| Trade
                Date: | February
                28, 2008 | ||
| Effective
                Date: | March
                4, 2008 | ||
| Option
                Type: | Call | ||
| Issuer: | TXCO
                Resources, Inc. | ||
| Shares: | The
                shares of common stock of the Issuer, par value $0.01 per Share (Ticker
                Symbol: TXCO) | ||
| Number
                of Options: | 1,152,074
                less any Early Exercise Options. | ||
| Option
                Entitlement: | One
                Share per Option | ||
| Market
                Disruption Event: | Section
                6.3(a) of the Equity Definitions is hereby amended by replacing clause
                (ii) thereof in its entirety with the following: “(ii) an Exchange
                Disruption, or” and inserting immediately following clause (iii) thereof
                the following: “; in each case that the Calculation Agent determines is
                material.” | ||
| Relevant
                Price: | VWAP
                Price | ||
| VWAP
                Price: | The
                “Volume Weighted Average Price” per Share on such day, as displayed on
                Bloomberg Page “TXCO UQ<equity>AQR” (or any successor thereto) for
                the Issuer with respect to the period from 9:30 a.m. to 4:00 p.m.
                (New
                York City time) on such day, as determined by the Calculation Agent.
                If no
                price at such time is available, or there is a Market Disruption
                Event on
                such Expiration Date, the Calculation Agent shall determine the VWAP
                Price
                in a commercially reasonable manner. | ||
| Premium: | $6,175,116.64 | ||
| Premium
                Payment Date: | Effective
                Date | 
2
        | Exchange: | The
                Nasdaq Global Market | ||
| Related
                Exchange: | Any
                exchange on which options or futures on the relevant Shares are
                traded. | ||
| Clearance
                System: | DTC | ||
| Calculation
                Agent: | Party
                A. Whenever the Calculation Agent acts or makes a determination,
                it will
                do so in good faith and in a commercially reasonable manner consistent
                with its obligations under the Equity Definitions.  | ||
| Procedure
                for Exercise: | |||
| Expiration
                Time: | The
                close of trading on the Exchange | ||
| Expiration
                Date: | Each
                of the thirty (30) consecutive Scheduled Trading Days (the “Scheduled
                Expiration Period”)
                occurring immediately prior to February 28, 2013 or such earlier
                date
                specified by Party B in a written notice to Party A at least ten
                (10)
                calendar days prior to the Scheduled Expiration Period (an “Early
                Exercise Notice”);
                provided
                that if Party A receives notice that any of the Preferred Shares
                are
                converted prior to the tenth (10th) calendar day prior to the Scheduled
                Expiration Period (an “Early
                Exercise Event”),
                the Expiration Date with respect to a number of Options equal to
                the
                product of (x) the number of Preferred Shares converted and (y) the
                conversion rate then applicable to the Preferred Shares, (such Options
                being referred to herein as “Early
                Exercise Options”)
                shall occur on each of the thirty (30) consecutive Scheduled Trading
                Days
                occurring after the tenth (10th) calendar day after Party A receives
                notice of such event, or such earlier date after the Early Exercise
                Event
                that the Calculation Agent shall deem appropriate. If any Expiration
                Date
                shall not be an Exchange Business Day, such Expiration Date shall
                be
                postponed to the immediately succeeding Exchange Business Day and
                the
                corresponding Expiration Date for each subsequent Daily Number of
                Options
                shall be moved back an equal number of Exchange Business Days reflecting
                such postponement. | ||
| Daily
                Number of Options: | One
                thirtieth (1/30th) of the Number of Options; provided
                that with respect to any Expiration Date resulting from an Early
                Exercise
                Event, one thirtieth (1/30th) of such Early Exercise
                Options. | ||
| Automatic
                Exercise: | Applicable | ||
| Settlement
                Terms: | 
3
        | Settlement
                Method Election: | Applicable;
                provided
                that (i) any such election shall apply to all Exercise Dates (in
                accordance with the terms below) and may be for Cash Settlement or
                Net
                Share Settlement; (ii) references to “Physical Settlement” in Section 7.1
                of the Equity Definitions shall be replaced by references to “Net Share
                Settlement”; and (iii) Party B may elect Cash Settlement only if Party B
                represents and warrants to Party A in writing on the date of such
                election
                that, as of such date, Party B is not aware of any material nonpublic
                information concerning itself or the Shares and is electing Cash
                Settlement in good faith and not as part of a plan or scheme to evade
                compliance with the federal securities laws. At any time prior to
                making a
                Settlement Method Election, Party B may, without the consent of Party
                A,
                amend this Confirmation by notice to Party A to eliminate Party B’s right
                to elect Cash Settlement. | ||
| Electing
                Party | Party
                B | ||
| Settlement
                Method Election Date | The
                30th Scheduled Trading Day preceding the first Expiration
                Date | ||
| Default
                Settlement Method | Net
                Share Settlement | ||
| Settlement
                Date: | For
                all Daily Number Options exercised or deemed exercised on each Expiration
                Date, the third Exchange Business Day following the final Expiration
                Date. | ||
| Cash
                Settlement | If
                Cash Settlement applies, then, notwithstanding any contrary terms
                of
                Article 8 of the Equity Definitions, for any Daily Number of Options
                exercised or deemed exercised on any Exercise Date, Party A shall
                pay, on
                the Settlement Date, the Cash Settlement Amount to Party B. The Cash
                Settlement Amount shall be determined as follows: (i)
                If the Settlement Price is less than or equal to the Strike Price,
                then
                the Cash Settlement Amount shall equal zero. (ii)
                If the Settlement Price is greater than the Strike Price, then the
                Cash
                Settlement Amount shall equal the product of (i) the Daily Number
                of
                Options, (ii) the Option Entitlement and (iii) the Settlement Price
                minus
                the Strike Price. | 
4
        | Net
                Share Settlement: | On
                the Settlement Date, Party A shall deliver to Party B a number of
                whole
                Shares equal to the Number of Shares to be Delivered and will pay
                to Party
                B the Fractional Share Amount, if any. | ||
| Number
                of Shares to be Delivered: | The
                Cash Settlement Amount (determined as if Cash Settlement were applicable)
                divided by
                the Settlement Price, rounded down to the nearest whole
                number. | ||
| Cash
                Settlement Payment Date: | For
                all Daily Number of Options exercised or deemed exercised on each
                Exercise
                Date, the third Exchange Business Day following the final Expiration
                Date. | ||
| Settlement
                Currency: | USD | ||
| Settlement
                Price: | For
                any Daily Number of Options, the VWAP Price of the Shares on the
                relevant
                Expiration Date determined by Calculation Agent at the Expiration
                Time on
                the relevant Expiration Date for such Daily Number of Options. If
                no price
                at such time is available, or there is a Market Disruption Event
                on such
                Expiration Date, the Calculation Agent shall determine the Settlement
                Price in a commercially reasonable manner.  | ||
| Failure
                to Deliver: | Applicable | ||
| Other
                Applicable Provisions: | To
                the extent Party A is obligated to deliver Shares hereunder, the
                provisions of Sections 9.1(c), 9.8, 9.9, 9.10, 9.11 (except that
                the
                Representation and Agreement contained in Section 9.11 of the Equity
                Definitions shall be modified by excluding any representations therein
                relating to restrictions, obligations, limitations or requirements
                under
                applicable securities laws as a result of the fact that Party B is
                the
                issuer of the Shares) and 9.12 of the Equity Definitions will be
                applicable as if “Physical Settlement” applied to the
                Transaction. | ||
| Restricted
                Certificated Shares: | Notwithstanding
                anything to the contrary in the Equity Definitions, Party A may deliver,
                in whole or in part, any Shares required to be delivered to Party
                B
                hereunder in the form of restricted securities under the Securities
                Act
                (as defined below) and/or in certificated form in lieu of delivery
                through
                the Clearance System. With respect to any such certificated Shares,
                the
                Representation and Agreement contained in Section 9.11 of the Equity
                Definitions shall be modified by deleting the remainder of the provision
                after the word “encumbrance” in the fourth line
                thereof. | 
5
        | Adjustments: | |||
| Method
                of Adjustment: | Calculation
                Agent Adjustment | ||
| Extraordinary
                Dividend: | Any
                dividend or distribution that has an ex-dividend date occurring on
                or
                after the Trade Date and on or prior to the date on which Party A
                satisfies all of its delivery obligations hereunder; provided
                that no regular or periodic dividend on any of Party B’s outstanding
                preferred stock (including the Preferred Shares) shall be an Extraordinary
                Dividend. | ||
| Extraordinary
                Events: | |||
| Consequences
                of Merger Events and Tender Offers: | |||
| (a)
                Share-for-Share: | Modified
                Calculation Agent Adjustment, or at Party A’s election, Cancellation and
                Payment (Calculation Agent Determination) | ||
| (b)
                Share-for-Other: | Cancellation
                and Payment (Calculation Agent Determination) | ||
| (c)
                Share-for-Combined: | Component
                Adjustment, or at Party A’s election, Cancellation and Payment
                (Calculation Agent Determination) | ||
| Tender
                Offer: | Applicable | ||
| Delisting,
                Nationalization or Insolvency: | Cancellation
                and Payment (Calculation Agent
                Determination) | 
Additional
      Disruption Events:
    | (a)
                Change in Law: | Applicable;
                provided
                that Section 12.9(a)(ii) of the Equity Definitions is hereby amended
                by
                (i) replacing the phrase “the interpretation” in the third line thereof
                with the phrase “or announcement or statement of the formal or informal
                interpretation” and (ii) immediately following the word “Transaction” in
                clause (X) thereof, adding the phrase “in the manner contemplated by the
                Hedging Party on the Trade Date”. | |
| (b)
                Failure to Deliver: | Applicable | |
| (c)
                Insolvency Filing: | Applicable | 
6
        | (d)
                Hedging Disruption: | Applicable | ||
| (e)
                Increased Cost of Hedging:  | Applicable | ||
| (f)
                Loss of Stock Borrow:  | Not
                Applicable | ||
| Hedging
                Party: | For
                all applicable Additional Disruption Events, Party A | ||
| Determining
                Party: | For
                all applicable Additional Disruption Events, Party A | ||
| Non-Reliance: | Applicable | ||
| Agreements
                and Acknowledgments Regarding Hedging Activities: | Applicable | ||
| Additional
                Acknowledgments: | Applicable | ||
| Additional
                Termination Events: | Applicable.
                The following will constitute an Additional Termination
                Event: (a)
                Such other events specified in this Confirmation as being Additional
                Termination Events.  For
                the purpose of the foregoing Termination Event, the sole Affected
                Party
                will be Party B.  | ||
| Conversion
                Notice | In
                the event Party B shall elect a mandatory conversion of some or all
                of its
                Perpetual Convertible Preferred Stock pursuant to Article 2(d)(viii)
                of
                the Certificate of Designation, or if Party B receives a conversion
                notice
                under Section 2(b) of the Certificate of Designation, Party B shall
                promptly notify Party A in writing of such event, and in any event
                no
                later than 2 Exchange Trading Days after such election or receipt
                of such
                conversion notice. | 
| 3. | If
                any of the transactions contemplated by the Securities Purchase Agreement
                dated as of February 28, 2008 (the “Purchase
                Agreement”)
                among Party B and each
                of the Buyers specified therein relating to the sale of Perpetual
                Convertible Preferred Stock (the “Preferred
                Shares”)
                of Party B, shall fail to close on the date specified therein for
                any
                reason, or any subsequent date allowed thereunder for postponements
                permitted under the terms thereof , the entirety of this Transaction
                shall
                terminate automatically and Party B shall be the sole Affected Party
                and
                this Transaction shall be the sole Affected Transaction and
                such termination shall be treated as an Additional Termination
                Event. | 
| 4. | Calculations
                and Payment on Early Termination and on Certain Extraordinary
                Events.
                If
                Party A shall owe Party B any amount pursuant to Sections 12.2, 12.3,
                12.6, 12.7 or 12.9 of the Equity Definitions (except in the event
                of a
                Merger Event, Tender Offer, Insolvency or a Nationalization, in each
                case,
                in which the consideration or proceeds to be paid to holders of Shares
                consists solely of cash) or pursuant to Section 6(d)(ii) of the Agreement
                (except in the event of an Event of Default in which Party B is the
                Defaulting Party or a Termination Event in which Party B is the Affected
                Party, that resulted from an event or events within Party B’s control) (a
                “Payment
                Obligation”),
                Party B shall have the right, in its sole discretion, to require
                Party A
                to satisfy any such Payment Obligation by the Share Termination
                Alternative (as defined below) by giving irrevocable telephonic notice
                to
                Party A, confirmed in writing within one Scheduled Trading Day, between
                the hours of 9:00 A.M. and 12:00 P.M. New York City time on the relevant
                Merger Date, Tender Offer Date, Announcement Date or Early Termination
                Date, as applicable (“Notice
                of Share Termination”).
                Upon such Notice of Share Termination, the following provisions shall
                apply on the Scheduled Trading Day immediately following the relevant
                Merger Date, Tender Offer Date, Announcement Date or Early Termination
                Date, as applicable: | 
7
        | Share
                Termination Alternative:  | Applicable
                and means that Party A shall deliver to Party B the Share Termination
                Delivery Property on the date on which the Payment Obligation would
                otherwise be due pursuant to Section 12.7 or 12.9 of the Equity
                Definitions or Section 6(d)(ii) of the Agreement, as applicable (the
                “Share
                Termination Payment Date”),
                in satisfaction of the Payment Obligation.
 | 
| Share Termination Delivery Property: | A
                    number of Share Termination Delivery Units, as calculated by
                    the
                    Calculation Agent, equal to the Payment Obligation divided by
                    the Share
                    Termination Unit Price. The Calculation Agent shall adjust the
                    Share
                    Termination Delivery Property by replacing any fractional portion
                    of a
                    security therein with an amount of cash equal to the value of
                    such
                    fractional security based on the values used to calculate the
                    Share
                    Termination Unit Price.
 | 
| Share Termination Unit Price: | The
                value of property contained in one Share Termination Delivery Unit
                on the
                date such Share Termination Delivery Units are to be delivered as
                Share
                Termination Delivery Property, as determined by the Calculation Agent
                by
                commercially reasonable means and notified by the Calculation Agent
                to
                Party A at the time of notification of the Payment Obligation.
                 | 
| Share Termination Delivery Unit: | In
                the case of a Termination Event, Event of Default or Delisting, one
                Share
                or, in the case of a Merger Event, a Tender Offer, an Insolvency
                or
                Nationalization, a unit consisting of the number or amount of each
                type of
                property received by a holder of one Share (without consideration
                of any
                requirement to pay cash or other consideration in lieu of fractional
                amounts of any securities) in such Merger Event, Tender Offer, Insolvency
                or Nationalization. If such Merger Event, Tender Offer, Insolvency
                or
                Nationalization involves a choice of consideration to be received
                by
                holders, such holder shall be deemed to have elected to receive the
                maximum possible amount of cash. | 
| FailuretoDeliver: | Applicable | 
| Other applicable provisions: | If
                Share Termination Alternative is applicable, the provisions of Sections
                9.8, 9.9, 9.10, 9.11 and 9.12 of the Equity Definitions will be applicable
                as if “Physical Settlement” were applicable, except that all references to
                “Shares” shall be read as references to “Share Termination Delivery
                Units”; provided
                that the Representation and Agreement contained in Section 9.11 of
                the
                Equity Definitions shall be modified by excluding any representations
                therein relating to restrictions, obligations, limitations or requirements
                under applicable securities laws as a result of the fact that Party
                B is
                the issuer of any Share Termination Delivery Units (or any part
                thereof). | 
8
        | 5. | Additional
                Agreements, Representations and
                Covenants: | 
| (a) | Party
                B hereby represents and warrants to Party A, on each day from the
                Trade
                Date to and including the business day following the date on which
                Party A
                is able to initially complete a hedge of its position created by
                this
                Transaction, that Party B has publicly disclosed all material information
                necessary for Party B to be able to purchase or sell Shares in compliance
                with applicable federal securities laws and that it has publicly
                disclosed
                all material information with respect to its condition (financial
                or
                otherwise).  | 
| (b) | If
                Party B would be obligated to receive cash from Party A pursuant
                to the
                terms of this Agreement for any reason without having had the right
                to
                elect to receive Shares in satisfaction of such payment obligation,
                then
                Party B may elect that Party A deliver to Party B a number of Shares
                having a cash value equal to the amount of such payment obligation
                (such
                number of Shares to be delivered to be determined by the Calculation
                Agent
                acting in a commercially reasonable manner to determine the number
                of
                Shares that could be purchased over a reasonable period of time with
                the
                cash equivalent of such payment obligation). Settlement relating
                to any
                delivery of Shares pursuant to this paragraph (b) shall occur within
                a
                reasonable period of time.  | 
| (c) | Party
                B shall deliver to the Party A an opinion or opinions of counsel
                with
                respect to the matters set forth on Annex 1 hereto on or before the
                Effective Date.  | 
| (d) | In
                addition to the representations and warranties in the Agreement and
                those
                contained elsewhere herein, Party B represents and warrants to and
                for the
                benefit of, and agrees with, Party A as
                follows: | 
(i) (A)
      On
      the Effective Date, the Shares or securities that are convertible into, or
      exchangeable or exercisable for Shares, are not, and shall not be, subject
      to a
“restricted period,” as such term is defined in Regulation M (“Regulation
      M”)
      under
      the Securities Exchange Act of 1934, as amended (the “Exchange
      Act”)
      and
      (B) Party B shall not engage in any “distribution,” as such term is defined in
      Regulation M, other than a distribution meeting the requirements of the
      exceptions set forth in sections 101(b)(10) and 102(b)(7) of Regulation M,
      until
      the second Exchange Business Day immediately following the Trade
      Date.
    (ii) Party
      B
      is not entering into this Confirmation to create actual or apparent trading
      activity in the Shares (or any security convertible into or exchangeable for
      Shares) or to manipulate the price of the Shares (or any security convertible
      into or exchangeable for Shares) or otherwise in violation of the Exchange
      Act.
    (iii) Without
      limiting the generality of Section 3(a)(iii) of the Agreement, the Transaction
      will not violate Rule 13e-1 or Rule 13e-4 under the Exchange Act.
    (iv) Prior
      to
      the Effective Date, Party B shall deliver to Party A a resolution of Party
      B’s
      board of directors authorizing the Transaction and such other certificate or
      certificates as Party A shall reasonably request.
    (v) Party
      B
      is not, and after giving effect to the transactions contemplated hereby will
      not
      be, required to register as an “investment company” as such term is defined in
      the Investment Company Act of 1940, as amended.
    (vi) On
      the
      Trade Date (A) the assets of Party B at their fair valuation exceed the
      liabilities of Party B, including contingent liabilities, (B) the capital of
      Party B is adequate to conduct the business of Party B and (C) Party B has
      the
      ability to pay its debts and obligations as such debts mature and does not
      intend to, or does not believe that it will, incur debt beyond its ability
      to
      pay as such debts mature.
    (vii) Party
      B
      acknowledges its responsibilities under applicable federal securities laws,
      including without limitation Rule 10b-5 under the Exchange Act, in relation
      to
      the Transaction.
    9
        | (e) | Each
                of Party A and Party B agrees and represents that it is an “eligible
                contract participant” as defined in Section 1a(12) of the U.S. Commodity
                Exchange Act, as amended. The parties hereto further agree and acknowledge
                (A) that this Confirmation is (i) a “securities contract,” as such term is
                defined in Section 741(7) of the Bankruptcy Code, with respect to
                which
                each payment and delivery hereunder is a “settlement payment,” as such
                term is defined in Section 741(8) of the Bankruptcy Code, and (ii)
                a “swap
                agreement,” as such term is defined in Section 101(53B) of the Bankruptcy
                Code, with respect to which each payment and delivery hereunder is
                a
                “transfer,” as such term is defined in Section 101(54) of the Bankruptcy
                Code, and (B) that Party A is entitled to the protections afforded
                by,
                among other sections, Sections 362(b)(6), 362(b)(17), 546(e), 546(g),
                555
                and 560 of the Bankruptcy Code.  | 
| (f) | Party
                B intends that all documentation with respect to this Transaction
                is
                intended to qualify this Transaction as an equity instrument for
                purposes
                of SFAS 150 and EITF 00-19. Party A acknowledges and agrees that
                this
                Confirmation is not intended to convey to it rights with respect
                to the
                Transaction that are senior to the claims of common stockholders
                in the
                event of Party B’s bankruptcy. For the avoidance of doubt, the parties
                agree that the preceding sentence shall not apply at any time other
                than
                during Party B’s bankruptcy to any claim arising as a result of a breach
                by Party B of any of its obligations under this Confirmation or the
                Agreement.  | 
| 6. | Staggered
                Settlement: | 
If
      Party
      A determines reasonably and in good faith that the sum of (i) the number of
      Shares required to be delivered to Party B hereunder on any Cash
      Settlement
      Payment Date, and (ii) any other Shares beneficially owned by Party A, would
      exceed 9.9%
      of
      all outstanding Shares, then Party A may, by notice to Party B on or prior
      to
      such Cash Settlement Payment Date (a “Nominal
      Settlement Date”),
      elect
      to deliver the Shares comprising the related Cash Settlement Amount (in the
      case
      of Net Share Settlement) on two or more dates (each, a “Staggered
      Settlement Date”)
      as
      follows: 
    | (a) | in
                such notice, Party A will specify to Party B the related Staggered
                Settlement Dates (the first of which will be such Nominal Settlement
                Date
                and the last of which will be no later than the twentieth (20th)
                Exchange
                Business Day following such Nominal Settlement Date) and the number
                of
                Shares that it will deliver on each Staggered Settlement Date;
                 | 
| (b) | the
                aggregate number of Shares that Party A will deliver to Party B hereunder
                on all such Staggered Settlement Dates will equal the number of Shares
                that Party A would otherwise be required to deliver on such Nominal
                Settlement Date; and  | 
| (c) | if
                the Net Share Settlement terms set forth above were to apply on the
                Nominal Settlement Date, then the Net Share Settlement terms will
                apply on
                each Staggered Settlement Date, except that the Shares comprising
                the Cash
                Settlement Amount will be allocated among such Staggered Settlement
                Dates
                as specified by Party A in the notice referred to in clause (a) above.
                 | 
Notwithstanding
      anything herein to the contrary, Party A shall be entitled to deliver Shares
      to
      Party B from time to time prior to the date on which Party A would be obligated
      to deliver them to Party B pursuant to the Net Share Settlement terms set forth
      above, and Party B agrees to credit all such early deliveries against Party
      A’s
      obligations hereunder in the direct order in which such obligations arise.
      To
      the extent Party A receives or is entitled to receive any distribution or
      payment in respect of Shares by reason of Party A’s being a holder of record of
      such Shares on any date after the Nominal Settlement Date which Party A would
      have delivered to Party B on such Nominal Settlement Date but for the provisions
      of this Section 6, Party A shall deliver such distribution or payment to Party
      B
      at the time Party A delivers the related Shares to Party B in accordance with
      this Section 6, if such distribution or payment has already been received by
      Party A at such time, or within a reasonable period of time following Party
      A’s
      receipt of the distribution or payment, if such distribution or payment has
      not
      already been received by Party A at the time Party A delivers the related Shares
      to Party B in accordance with this Section 6. 
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        | 7. | Transfer.
                Party
                B shall not transfer or assign its rights or obligations hereunder
                and
                under the Agreement without the prior written consent of Party A.
                Party A
                may transfer or assign without Party B’s consent its rights and
                obligations hereunder and under the Agreement, in whole or in
                part. | 
| 8. | Disposition
                of Hedge Shares.
                Party B hereby agrees that if, in the good faith reasonable judgment
                of
                Party A or Issuer, based on the advice of counsel, the Shares (the
                “Hedge
                Shares”)
                acquired by Party A for the purpose of hedging its obligations pursuant
                to
                the Transaction
                cannot be sold in the public market by Party A without registration
                under
                the Securities Act, Party B shall, at its election: (i) in order
                to allow
                Party A to sell the Hedge Shares in a registered offering, make available
                to Party A an effective registration statement under the Securities
                Act to
                cover the resale of such Hedge Shares and (A) enter into an agreement,
                in
                form and substance satisfactory to Party A, substantially in the
                form of
                an underwriting agreement for underwritten follow-on offerings of
                equity
                securities of companies of comparable size, maturity and lines of
                business, (B) provide accountant’s “comfort” letters in customary form for
                underwritten follow-on offerings of equity securities of companies
                of
                comparable size, maturity and lines of business, (C) provide disclosure
                opinions of nationally recognized outside counsel to Party B as are
                customarily requested in connection with underwritten follow-on offers
                of
                equity securities of companies of comparable size, maturity and lines
                of
                business, (D) provide other customary opinions, certificates and
                closing
                documents customary in form for underwritten follow-on offers of
                equity
                securities of companies of comparable size, maturity and lines of
                business
                and (E) afford Party A a reasonable opportunity to conduct a “due
                diligence” investigation with respect to Party B customary in scope for
                underwritten follow-on offers of equity securities of companies of
                comparable size, maturity and lines of business; provided,
                however, that
                if Party A, in its sole discretion, is not satisfied with access
                to due
                diligence materials, the results of its due diligence investigation,
                or
                the procedures and documentation for the registered offering referred
                to
                above, then clause (ii) of this Section 8(c) shall apply; provided
                that Party A has given the Party B reasonable notice of its determination
                and provided the Party B with reasonable opportunity to satisfy Party
                A’s
                concerns;
                (ii) in order to allow Party A to sell the Hedge Shares in a private
                placement enter into a private placement agreement substantially
                similar
                to private placement purchase agreements customary for private placements
                of equity securities of companies of comparable size, maturity and
                lines
                of business, in form and substance reasonably satisfactory to Party
                A,
                including customary representations, covenants, blue sky and other
                governmental filings and/or registrations, indemnities to Party A,
                due
                diligence rights (for Party A or any designated buyer of the Hedge
                Shares
                from Party A), opinions and certificates and such other documentation
                as
                is customary for private placements agreements, all reasonably acceptable
                to Party A (in which case, the Calculation Agent shall make any
                adjustments to the terms of the Transaction that are necessary, in
                its
                reasonable judgment, to compensate Party A for any discount from
                the
                public market price of the Shares incurred on the sale of Hedge Shares
                in
                a private placement).  | 
| 9. | Account
                Details:  | 
| Payments
                to Party A: | To
                be provided in writing upon request | |
| Payments
                to Party B: | To
                be advised in writing upon request | |
| Deliveries
                to Party B: | To
                be advised in writing upon request | 
| 10. | Waiver
                of Jury Trial. EACH
                OF PARTY B AND PARTY A HEREBY IRREVOCABLY WAIVES (ON ITS OWN BEHALF
                AND,
                TO THE EXTENT PERMITTED BY APPLICABLE LAW, ON BEHALF OF ITS STOCKHOLDERS)
                ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM
                (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR
                RELATING
                TO THE TRANSACTION OR THE ACTIONS OF PARTY B OR ITS AFFILIATES OR
                PARTY A
                OR ITS AFFILIATES IN THE NEGOTIATION, PERFORMANCE OR ENFORCEMENT
                HEREOF  | 
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        | 11. | Governing
                Law. THE AGREEMENT AND THIS CONFIRMATION AND ANY OTHER MATTERS ARISING
                OUT
                OF OR RELATING TO THE TRANSACTION OR THE ACTIONS OF PARTY B OR ITS
                AFFILIATES OR PARTY A OR ITS AFFILIATES IN THE NEGOTIATION, PERFORMANCE
                OR
                ENFORCEMENT HEREOF SHALL BE GOVERNED BY THE LAWS OF THE STATE OF
                NEW YORK.
                THE PARTIES HERETO IRREVOCABLY SUBMIT TO THE EXCLUSIVE JURISDICTION
                OF THE
                COURTS OF THE STATE OF NEW YORK AND THE UNITED STATES COURT FOR THE
                SOUTHERN DISTRICT OF NEW YORK IN CONNECTION WITH ALL MATTERS RELATING
                HERETO AND WAIVE ANY OBJECTION TO THE LAYING OF VENUE IN, AND ANY
                CLAIM OF
                INCONVENIENT FORUM WITH RESPECT TO, THESE COURTS. | 
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        Please
      confirm that the foregoing correctly sets forth the terms of your agreement
      by
      signing and returning this Confirmation.
    | Very
                  truly yours, | ||
|  | ||
| CAPITAL
                  VENTURES INTERNATIONAL | ||
| BY:
                  HEIGHTS CAPITAL MANAGEMENT, INC,  | ||
| Its
                  Authorized Agent | ||
| (Party
                  A) | ||
|  | ||
| By: | /s/
                  ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ | |
| Name:
                  ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ | ||
| Title:
                  Investment Manager | ||
Confirmed
      as of the date first written above: 
    (Party
      B)
    | By:   | /s/
                  ▇▇▇▇▇ ▇. ▇▇▇▇▇▇ | |
| Name: |  ▇▇▇▇▇
                  ▇. ▇▇▇▇▇▇ | |
| Title: |  President | 
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        ANNEX
      I
    Matters
      to be covered in Opinion of Counsel to Party B 
    1. Party
      B
      is validly existing as a corporation in good standing under the laws of the
      State of Delaware. 
    2. Party
      B
      has the requisite corporate power and authority to enter into the Transaction
      (for purposes of this Annex 1, the “Agreement”)
      and to
      carry out the Transactions contemplated thereby. 
    3. The
      execution and delivery by Party B of the Transaction, and the performance by
      Party B of its obligations under the Transaction, have been duly authorized
      by
      all necessary corporate action on the part of Party B. 
    4. The
      Transaction has been duly authorized, executed and delivered by Party
      B.
    5. No
      consent, approval or authorization of, or registration, filing or declaration
      with, any governmental or public body or authority is required in connection
      with the execution, delivery or performance by Party B of the Transaction.
      
    6. The
      execution, delivery and performance by Party B of the Transaction and compliance
      by Party B with the terms and provisions thereof will not, whether with or
      without the giving of notice or lapse of time or both, result in a breach or
      violation of any of the terms and provisions of, or constitute a default under,
      (A) any material indenture, mortgage, deed of trust, loan, purchase or credit
      agreement, lease, corporate charter or by-laws, or any other agreement or
      instrument to which Party B or any subsidiary is bound or by which Party B
      or
      any subsidiary or any of their respective properties may be bound or affected,
      or (B) any Delaware or federal law, statute, rule, regulation or order or any
      judgment, order, writ or decree of any governmental agency or body or any court
      having jurisdiction over Party B or any of its properties. 
    7. Neither
      Party B nor any subsidiary is an “investment company” or a company “controlled”
by an “investment company”, in each case within the meanings ascribed to such
      terms in the Investment Company Act of 1940, as amended, nor is Party B or
      any
      subsidiary subject to regulation under said Act.