COLLEGE ZOOLOGY 



By 

 ROBERT W. HEGNER, Ph.D. 



Assistant Professor of Zoology in the University of Michigan 



Illustrated, Cloth, 12mo, xxiv + 733 pp., $2.60 net 



This book is intended to serve as a text for beginning students in uni- 

 versities and colleges, or for students who have already taken a course in 

 general biology and wish to gain a more comprehensive view of the animal 

 kingdom. It differs from many of the college text-books of zoology now 

 on the market in several important respects: (i) the animals and their 

 organs are not only described, but their functions are pointed out; (2) the 

 animals described are in most cases native species; and (3) the relations 

 of the animals to man are emphasized. Besides serving as a text-book, it 

 is believed that this book will be of interest to the general reader, since it 

 gives a bird's-eye view of the entire animal kingdom as we know it at the 

 present time. 



Within the past decade there has been a tendency for teachers of zoology 

 to pay less attention to morphology and more to physiology. As a promi- 

 nent morphologist recently said, " Morphology ... is no longer in favor 

 . . . and among a section of the zoological world has almost fallen into 

 disgrace" (Bourne). The study of the form and structure of animals is, 

 however, of fundamental importance, and is absolutely necessary before 

 physiological processes can be fully understood; but a course which is 

 built up on the " old-fashioned morphological lines " is no longer adequate 

 for the presentation of zoological principles. 



The present volume has not been made by merely adding a description 

 of the vertebrates to the author's "Introduction to Zoology" (for a brief 

 account of which see the last pages of this circular). On the contrary, it 

 is a new work throughout, although the same general method of treatment, 

 which proved so successful in the earlier book, has been employed in this 

 one. Similarly, in the preparation of this book the author has submitted 

 the manuscript of each chapter to a scholar and teacher of unquestioned 

 authority in the particular h'eld. The criticisms and suggestions thus se- 

 cured have greatly increased both the accuracy and the practicability of 

 the text. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



