TEXT-BOOK 



OF THE 



EMBRYOLOGY or MAN AND MAMMALS 



BY 



DE. OSCAE HEETWIG 



Professor extraordinarlus of Anatomy and Comparative Anatomy, Director of the IL Anatomical 

 Institute or the University of Berlin 



TRANSLATED FROM THE THIRD GERMAN EDITION 



BY 



EDWARD L. MARK, Pn.D 



Hcrsey Professor of Anatomy in Harcard University 



SStitlr 339 um in tire &e*t ml) 2 



: SWAN SONNENSCHEIN & CO., LIM. 

 NEW : YOft: ' 'MS jrACMILL^N CU 



"1001 ;,,;;" 



ht!:lik':fcj v-j-v-:; 



