AMERICAN NATURE SERIES (Continued) 



with Chapter on Anatomy of Birds by FREDERIC A. LUCAS, 

 Chief Curator Brooklyn Museum of Arts and Sciences, and edited 

 by ROBERT RIDGWAY, Curator of Birds, U. S. National Museum. 



REPTILES AND BATRACHIANS, by LEONHARD STEJKEGER, Cura- 

 tor of Reptiles, U. S. National Museum. 



Section B. A Shorter Natural History, mainly by the Authors 

 of Section A, preserving its popular character, its proportional treat- 

 ment, and its authority so far as that can be preserved without its 

 fullness. Size not yet determined. 



II. CLASSIFICATION OF NATURE 



1. Library Series, very full descriptions. 8vo. 7xlO| in. 



Already publisht: 

 NORTH AMERICAN TREES, by N. L. BRITTOK, Director of the 



New York Botanical Garden. $7.00 net; carriage extra. 

 FERNS, by CAMPBELL E. WATERS, of Johns Hopkins University 



8vo, pp. xi+362. $3.00 net; by mail, $3.30. 



2. Pocket Series, Identification Books" How to Know," brief and 



in portable shape. 



III. FUNCTIONS OF NATURE 



These books will treat of the relation of facts to causes and 

 effects of heredity and the relations of organism to environment. 

 8vo. 6f x8| in. 



A Iready publisht : 

 THE BIRD : ITS FORM AND FUNCTION, by C. W. BEEBE, 



Curator of Birds in the New York Zoological Park. 8vo, 496 pp. 



$3.50 net; by mail, $3.80. 



Arranged for: 

 THE INSECT: ITS FORM AND FUNCTION, by VERNON L. 



KELLOGG, Professor in the Leland Stanford Junior University. 



THE FISH: ITS FORM AND FUNCTION, by H. M. SMITH, of 

 the U. S. Bureau of Fisheries. 



