An Introduction to Zodlogy 
By 
ROBERT W. HEGNER, Ph.D. 
Assistant Professor of Zoélogy in the University of Michigan 
A TEXT-BOOK INTENDED FOR THE USE OF STUDENTS 
IN COLLEGES AND UNIVERSITIES 
Illustrated, 12mo, $ 1.90 net 
‘‘There are some interesting distinctive features in this new introduc- 
tion to zodlogy. Only a few types are studied (all of them Invertebrates) ; 
they are discussed so as to illustrate the principles of the science; the 
morphological aspect is not especially emphasized, but is codrdinated 
with the physiological aspect (which, of course, includes the study of 
interrelations and behavior).” 
“The author shows a keen educative instinct; there is a marked 
freshness and individuality of treatment, and the assistance of a number 
of experts, who have read particular chapters, has secured an enviable 
freedom from mistakes. There is a very useful bibliography, and a glos- 
sary.” 
“Tt is a work which it has been a pleasure to read, and which de- 
serves a career of much usefulness.” — Nature. 
“The book is cordially recommended as giving a thorough prepara- 
tion for advanced courses in the subject.” 
— American Journal of Science. 
“The attempt is made to present the newer zodlogy to the beginner. 
Here we find the figures of Jennings, Yerkes, Morgan — in fact, it may be 
called an American product from cover to cover. Consequently, the 
student finds himself at home at once among American forms and Ameri- 
can names. It is not to be understood, however, that the view is circum- 
scribed and that the data from foreign sources are eliminated.” 
“It may be said that the result is excellent in the light of the labor 
set before the author. The book-making is good, the illustrations are 
carefully selected, and there is a unity in the volume which appeals very 
strongly to the reviewer.” — Science. 
THE MACMILLAN COMPANY 
Publishers 64-66 Fifth Avenue New York 
