TEXT-BOOK 



OF 



ELEMENTARY ZOOLOGY 



For Secondary Educational Institutions 



BY 

 THOMAS WALTON GALLOWAY, Ph. D. 



PROFESSOR OF BIOLOGY IN THE JAMES MILLIKIN UNIVERSITY, 

 DECATUR, ILLINOIS 



WITH 160 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO. 



1012 WALNUT STREET 

 1910 



940 



