EXHIBIT 23.3
             
             CONSENT OF MCDONNELL, BOEHNEN, HULBERT, BERGHOFF LTD.

      We hereby consent to the reference to our firm contained in the 
Registration Statement on Form S-1 of Megabios Corp. under the caption 
"Experts."


                                      MCDONNELL, BOEHNEN, HULBERT,
                                       BERGHOFF LTD.


                  
                                      By:/s/ John McDonnell
                                         ------------------------
                                         John McDonnell


August 15, 1997