1
                                                         Exhibit 23.3



                         Consent of Independent Auditors


        We consent to the reference to our firm under the captions "Selected
Financial Data" and "Experts", and to the use of our report dated August 26,
1993, except for Note 14, as to which the date is October 8, 1993, with respect
to the consolidated financial statements of TSI Corporation for the year ended  
June 27, 1993, included in Amendment NO. 1 to the Registration Statement (Form
S-1 NO. 333-05843) and related Prospectus of Genzyme Transgenics Corporation.



                                                              ERNST & YOUNG LLP



Boston, Massachusetts
June 25, 1996