p 



A LABORATORY MANUAL AND TEXT-BOOK 



of 



EMBRYOLOGY 



By 



CHARLES WILLIAM PRENTISS 



iii 



LATE PROFESSOR OP MICROSCOPIC ANATOMY, NORTHWESTERN UNIVERSITY MEDICAL SCHOOL, CHICAGO 



Revised and Rewritten by 



LESLIE BRAINERD AREY 



PROFESSOR OF MICROSCOPIC ANATOMY AT THE NORTHWESTERN UNIVERSITY MEDICAL SCHOOL 



THIRD EDITION, ENLARGED 



WITH 388 ILLUSTRATIONS 



MANY IN COLOR 



PHILADELPHIA AND LONDON 



W. B. SAUNDERS COMPANY 



1922 



