TEXTBOOK ^ 



OF 



ZOOLOGY 



BY 



GEORGE EDWIN POTTER, Ph.D. 



Professor of Zoology, Agricultural and Mechanical College of 

 Texas, Formerly Professor of Zoology, Baylor University 



SECOND EDITION 



With 445 Text Illustrations 



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ST. LOUIS 



THE C. V. MOSBY COMPANY 



1947 



