TEXT-BOOK 



OF THE 



EMBRYOLOGY or MAN AND MAMMALS 



BY 



DR. OSCAR HERTWIG 



Professor extraordinarily of Anatomy and Comparative Anatomy, Director of the If. Anatomical 

 Institute oj the University of Berlin 



TRANSLATED FROM THE THIRD GERMAN EDITION 



BY 



EDWARD L. MARK, PH.D. 



Hersey Professor of Anatomy in Harvard University 



339 <fj0uws iw ibt fet ajtfc 2 Si 



LONDON: SWAN SONNENSCHEIN & CO., LIM. 

 NEW YORK: THE MACMILLAN CO. 



1901 



