A LABORATORY MANUAL OF 



INVERTEBRATE 

 ZOOLOGY 



BY 



GILMAN A. DREW, PH.D. 



Late Assistant Director of the Marine Biological 

 Laboratory, Woods Hole, Massachusetts 



Revised by 

 JAMES A. DAWSON, Ph.D. 



Associate Professor of Biology, The College of the 

 City of New York 



AND 



LEONARD P. SAYLES, Ph.D. 



Assistant Professor of Biology, The College of the 

 City of New York 







FIFTH EDITION, RESET —, ._ jsif 





Ms* 



PHILADELPHIA AND LONDON 



W. B. SAUNDERS COMPANY 



1936 



