THE AMERICAN ANATOMICAL 



MEMOIRS 



NO. 16 



NUMBERS 1 TO 7, INCLUSIVE, APPEARED AS MEMOIRS or 

 THB WISTAK INSTITUTE OF ANATOMY AND BIOLOGY 



EDITED BY 



CHARLES R. STOCKARD 

 CORNELL UNIVERSITY MEDICAL SCHOOL 



HERBERT M. EVANS 

 UNIVERSITY or CALIFORNIA, BERKELEY 



THE EMBRYOLOGY OF THE OPOSSUM 



EDWARD McCRADY, JR. 



The Eflingham B. Morris Biological Farm of The Wigtar Jiistitnti- 



r.Y 



THE W1STA1I INSTITITE OP ANATOMY AND I'.IOLOGY 

 JMIILADKLl'IIIA, PA., U.S.A. 



L938 



