HANDBOOKS for Students and General Readers. 



ZOOLOGY 



OF THE 



VERTEBRATE ANIMALS 



BY 



ALEX. MACALISTER, M.D. 



Professor of Zoology and Comparative Anatomy in the 

 University of Dublin. 



Specially Revised for American Stttdents 



A. S. PACKARD, JR., M.D. 



Professor of Natural History in 

 Brown University 



NEW YORK 

 HENRY HOLT AND COMPANY 



1878 



