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, in the Registration Statement (Form S-1) and related Prospectus
of Genzyme Transgenics Corporation for the registration of 3,000,000 shares of
its common stock.



                                                              ERNST & YOUNG LLP



Boston, Massachusetts
June 6, 1996