AMERICAN SCIENCE SERIES 



ZOOLOGY 



FOR • 



STUDENTS AND GENERAL READERS 



BY 



A. S. PACKARD, Jr., M.D., Ph.D., 



MEMBER OF THE NATIONAL ACADEMY OF SCIENCES ; PROFESSOR OF ZOOLOGY 

 AND GEOLOGY IN BROWN UNIVERSITY. 



WITH NUMEROUS ILLUSTRATIONS 



•^ 



NEW YORK 



HENRY HOLT AND COMPANY 



1879 





