EXHIBIT
      31.2




Section 302
      Certification





I,
      John
      W. Burns, certify that:





1. I
      have
      reviewed this quarterly report on Form 10-Q of GlycoGenesys, Inc.;





2. Based
      on my
      knowledge, this quarterly report does not contain any untrue statement of a
      material fact or omit to state a material fact necessary to make the statements
      made, in light of the circumstances under which such statements were made,
      not
      misleading with respect to the period covered by this quarterly report;





3. Based
      on my
      knowledge, the financial statements, and other financial information included
      in
      this quarterly report, fairly present in all material respects the financial
      condition, results of operations and cash flows of the registrant as of, and
      for, the periods presented in this quarterly report;





4. The
      registrant’s other certifying officers and I are responsible for establishing
      and maintaining disclosure controls and procedures (as defined in Exchange
      Act
      Rules 13a-15(e) and 15d-15(e)) for the registrant and have:




a) designed
      such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated subsidiaries,
      is made known to us by others within those entities, particularly during the
      period in which this quarterly report is being prepared;




b) **[Paragraph
      reserved pursuant to SEC Release 33-8238];**




c) evaluated
      the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this
      report based on such evaluation; and




d) disclosed
      in this
      report any change in the registrant’s internal control over financial reporting
      that occurred during the registrant’s most recent fiscal quarter (the
      registrant’s fourth fiscal quarter in the case of an annual report) that has
      materially affected, or is reasonably likely to materially affect the
      registrant’s internal control over financial reporting.




5. The
      registrant’s other certifying officers and I have disclosed, based on our most
      recent evaluation of internal control over financial reporting to the
      registrant’s auditors and the audit committee of the registrant’s board of
      directors (or persons performing the equivalent functions):




a) all
      significant
      deficiencies and material weaknesses in the design or operation of internal
      control over financial reporting which are reasonably likely to adversely affect
      the registrant’s ability to record, process, summarize and report financial
      information; and




b) any
      fraud, whether or
      not material, that involves management or other employees who have a significant
      role in the registrant’s internal controls over financial
      reporting.







Date:November
      16, 2005





By:
                /s/ John W. Burns
              John
                W. Burns
              Senior
                Vice President and Chief Financial Officer
              (Principal
                Financial Officer)