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      </Form990PartVIISectionA>
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        <NamePerson>Elise Rose</NamePerson>
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      </Form990PartVIISectionA>
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        <NamePerson>Charles Rosenthal</NamePerson>
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      </Form990PartVIISectionA>
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        <NamePerson>John Rowe</NamePerson>
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        <NamePerson>Joan Ruderman</NamePerson>
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        <NamePerson>Walter Salmon</NamePerson>
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        <NamePerson>James Sharp</NamePerson>
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        <NamePerson>Christopher Weld</NamePerson>
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      </Form990PartVIISectionA>
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        <NamePerson>Rita Colwell</NamePerson>
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        <NamePerson>Robert Haselkorn</NamePerson>
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        <NamePerson>William Huyett</NamePerson>
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      </Form990PartVIISectionA>
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        <NamePerson>Ethan Lerner</NamePerson>
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      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Walter Massey</NamePerson>
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        <NamePerson>Gary Borisy</NamePerson>
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        <OtherCompensation>40673</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Dyann Wirth</NamePerson>
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      </Form990PartVIISectionA>
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        <NamePerson>Maureen Nunez</NamePerson>
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        <NamePerson>Hugh Ducklow</NamePerson>
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        <NamePerson>Joshua Hamilton</NamePerson>
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        <NamePerson>Mitchell Sogin</NamePerson>
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        <NamePerson>Roger Hanlon</NamePerson>
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        <NamePerson>Stephen Highstein</NamePerson>
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        <OtherCompensation>35652</OtherCompensation>
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        <NamePerson>Jerry Melillo</NamePerson>
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        <OtherCompensation>37627</OtherCompensation>
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        <NamePerson>Gaius Shaver</NamePerson>
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        <NamePerson>William Reznikoff</NamePerson>
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        <OtherCompensation>18839</OtherCompensation>
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          <NameBusiness>
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            <State>OH</State>
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        <NoncashContribsRptdF990>0</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>NA</MethodOfDeterminingRevenues>
      </ArtHistoricalTreasures>
      <SecuritiesPubliclyTraded>
        <NonCashCheckbox>X</NonCashCheckbox>
        <NumberOfContributions>23</NumberOfContributions>
        <NoncashContribsRptdF990>417241</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>Market value</MethodOfDeterminingRevenues>
      </SecuritiesPubliclyTraded>
      <RealEstateResidential>
        <NonCashCheckbox>X</NonCashCheckbox>
        <NumberOfContributions>1</NumberOfContributions>
        <NoncashContribsRptdF990>295577</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>Appraisal</MethodOfDeterminingRevenues>
      </RealEstateResidential>
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>Scientific equipment</Description>
        <NumberOfContributions>3</NumberOfContributions>
        <NoncashContribsRptdF990>12702</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>Market value</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <NumberOf8283Received>3</NumberOf8283Received>
      <AnyPropertyThatMustBeHeld>0</AnyPropertyThatMustBeHeld>
      <ReviewProcessUnusualNCGifts>1</ReviewProcessUnusualNCGifts>
      <ThirdPartiesUsed>1</ThirdPartiesUsed>
      <Form990ScheduleMPartII>
        <Identifier>SchM_P01_S00_L15</Identifier>
        <ReturnReference>Schedule M, Part I, Line 15</ReturnReference>
        <Explanation>The MBL was deeded a remainder life trust that consists of a residential property in Woods Hole, MA. The trustee of the property has a remainder interest in the property which allows her to live in the house until her death. The trustee is responsible for all payments and maintenance associated with the property until that time. The MBL can use the property or sell it and invest the proceeds in a permanently restricted endowment fund. The property was valued using an independent appraisal and the IRS remainder value calculation.</Explanation>
      </Form990ScheduleMPartII>
      <Form990ScheduleMPartII>
        <Identifier>SchM_P01_S00_L32b</Identifier>
        <ReturnReference>Schedule M, Part I, Line 32b</ReturnReference>
        <Explanation>Stock donations are typically received in the MBL's Morgan Stanley Smith Barney account and typically sold as soon as possible by Morgan Stanley Smith Barney.</Explanation>
      </Form990ScheduleMPartII>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="R000013" softwareId="12000197" softwareVersion="v1.00">
      <GeneralExplanation>
        <Identifier>F990_P06_S0A_L06</Identifier>
        <ReturnReference>Form 990, Part VI, Section A, Line 6</ReturnReference>
        <Explanation>Under the bylaws in effect in 2012, there were 352 Corporation Members who were nominated by the Science Council and elected at the annual or special meeting by the members to serve until death or resignation. The Corporation Members had limited voting rights regarding changes in the Bylaws. Bylaw amendments, which have been made by the Board, could be amended or repealed by the Members at a properly called meeting. Specifically reserved to the Members was the power to amend the sections of the Bylaws related to removal of Trustees and Bylaw amendments, and any other provisions of the Bylaws (or as required by law or the Articles of Organization) that require action by the Members. (These provisions were amended in 2013.)</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0A_L07a</Identifier>
        <ReturnReference>Form 990, Part VI, Section A, Line 7a</ReturnReference>
        <Explanation>Under the bylaws in effect in 2012, the Corporation Members elected a Chair of the Science Council, who also was a member of the governing board. (These provisions were amended in 2013.)</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0A_L07b</Identifier>
        <ReturnReference>Form 990, Part VI, Section A, Line 7b</ReturnReference>
        <Explanation>As described above in the context of Part VI, Section A, Line 6.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0B_L11b</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 11b</ReturnReference>
        <Explanation>Form 990 is prepared by the MBL staff and reviewed by Grant Thornton LLP, the institutions audit and tax services firm. A draft copy is then submitted to the Audit Committee of the Board of Trustees for a review. The final version is given to all members of the Board of Trustees at least five (5) days before the filing date.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0B_L12c</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 12c</ReturnReference>
        <Explanation>The process in 2012 was that all employees of the MBL were annually sent the following from Human Resources: a link to the online MBL conflict of interest policy, a memo explaining the need for all employees to fill out the disclosure form, and the disclosure form. Human Resources ensured that all employees returned the form by the requested due date. The forms were reviewed and signed by the Human Resources Director. All forms with a potential conflict of interest were reviewed by the MBL President/Director. The Human Resources Director and the President/Director would attempt to resolve the conflict with the employee. Failure to comply with the policy could result in dismissal, subject to and in accordance with the terms of any applicable employment agreement. All MBL board members were sent a copy of the Trustee conflict of interest policy and a conflict of interest disclosure form to be filed within 30 days of election to the board and annually thereafter. The disclosure forms were received by the President/Director's office, and forwarded to the Chief Financial Officer. The forms were reviewed for possible conflicts of interest by the Chairman of the Board. If conflicts of interest could not be resolved or the board member failed to comply with the policy, the board member could be subject to removal by a vote of the board pursuant to the bylaws. (The process for review of employees and board members was changed in 2013.)</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0B_L15</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 15</ReturnReference>
        <Explanation>The previous President/Director's compensation package for 2012 was determined and approved by the Board of Trustees after review of comparable salaries &amp; benefits in the industry using at least two sources of data. Contemporaneous substantiation of the deliberation and decision is maintained by the institution. The new President/Director appointed in November 2012 was offered a salary and benefit package substantially similar to the previous President/Director.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P06_S0C_L19</Identifier>
        <ReturnReference>Form 990, Part VI, Section C, Line 19</ReturnReference>
        <Explanation>The governing documents and conflict of interest policy are available on the website. Financial statements are available upon request to the CFO.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>F990_P11_S00_L09</Identifier>
        <ReturnReference>Form 990, Part XI, Line 9</ReturnReference>
        <Explanation>Other changes consists of the following deductions from revenue: the interest rate swap increase of $81,463, the periodic pension expense change of $488,445. The decrease in the present value annuities of $15,317 was added back to revenue. There was a $40,000 addition of expense for the Director's housing allowance (W-2 only).</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="R000014" softwareId="12000197" softwareVersion="v1.00">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>MBL Post Retirement Health Plan</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>7 MBL Street</AddressLine1>
          <City>Woods Hole</City>
          <State>MA</State>
          <ZIPCode>02543</ZIPCode>
        </AddressUS>
        <EIN>043285249</EIN>
        <PrimaryActivities>Post retirement health care benefits</PrimaryActivities>
        <LegalDomicileState>MA</LegalDomicileState>
        <ExemptCodeSection>501(C)(9)</ExemptCodeSection>
        <PublicCharityStatus>NA</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>Marine Biological Lab</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>1</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>TR U A Marine Biological Laboratory</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>7 MBL Street</AddressLine1>
          <City>Woods Hole</City>
          <State>MA</State>
          <ZIPCode>02543</ZIPCode>
        </AddressUS>
        <EIN>136044672</EIN>
        <PrimaryActivities>General support of the MBL</PrimaryActivities>
        <LegalDomicileState>NY</LegalDomicileState>
        <ExemptCodeSection>4947(a)(1)</ExemptCodeSection>
        <PublicCharityStatus>NA</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>Trustees</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>TR U A Marine Biological Lab Library</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>7 MBL Street</AddressLine1>
          <City>Woods Hole</City>
          <State>MA</State>
          <ZIPCode>02543</ZIPCode>
        </AddressUS>
        <EIN>136045011</EIN>
        <PrimaryActivities>Support for the MBL Library</PrimaryActivities>
        <LegalDomicileState>NY</LegalDomicileState>
        <ExemptCodeSection>4947(a)(1)</ExemptCodeSection>
        <PublicCharityStatus>NA</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>Trustees</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>0</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>0</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>1</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>0</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <DividendsRelatedOrganization>0</DividendsRelatedOrganization>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>0</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>0</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>0</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>1</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>0</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>0</SharingOfFacilities>
      <SharingOfPaidEmployees>0</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>0</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>0</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>0</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>0</OtherTransferFromOtherOrg>
    </IRS990ScheduleR>
  </ReturnData>
</Return>