ELEMENTS OF ZOOLOGY 



TO ACCOIMPANY THE 



FIELD AND LABORATORY STUDY OF 



ANUSIALS 



BY 



CHARLES BENEDICT DAVENPORT, Ph.D. 



DIRECTIIK OF THE DEPART JIICNT OF EXPEHIJIENTA I, EVOEFTION 

 CARNE(;IE INSTITUTION OK AVASIIINGTON, AND OF THE 

 BIOLOGICAL LABORATORY OF THE BROOKEVN INSTI- 

 TUTE OF ARTS AND SfaENCES, COLV SPRING 

 HAKHOR, LONG ISLAND 



AND 



GERTRUDE CROTTY DAVENPORT, B.S. 



P^ORJMERLV INSTRUCTOR IN ZOOLOGY AT THE 

 UNIVERSITY OF KANSAS 



WITH FOUR HUNDRED AND TWENTY-(JNE HAUSTRATIONS 



REVISED EDITION 



THE MACMILLAN COMPANY 

 1911 



All rights resei-ved 



