A LABORATORY MANUAL AND TEXT-BOOK 



of 



EMBRYOLOGY 



By 

 CHARLES WILLIAM PRENTISS, A. M., Ph. D. 



LATE PROFESSOR OF MTCROSCOPIC ANATOMY, NORTHWESTERN TJNIVERSITY MEDICAL SCHOOL, CHICAGO 



Revised and Extensively Rewritten by 



LESLIE BRAINERD AREY, Ph. D. 



ASSOCIATE PROFESSOR OF ANATOMY IN THI; NORTHWESTERN UNIVERSITY MEDICAL SCHOOL, CHICAGO 



SECOND EDITION, ENLARGED 



WITH 388. ILLUSTRATIONS 



MANY IN COLOR 



PHILADELPHIA AND LONDON 



W. B. SAUNDERS COMPANY 



1917 



