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                                                                    EXHIBIT 23.3
 
                               CONSENT OF COUNSEL
 
     The undersigned hereby consents to the use of our name and the statement
with respect to us that appears under the heading "Experts" in the Registration
Statement.
 
                                          FISH & RICHARDSON P.C.
 
                                          BY: /s/  John Wetherell
                                            John Wetherell
 
July 10, 1996