BIOLOGY 



LIBRARY 



6 



Copyright, 1904, by 

 WILLIAM T. HORNADAY 



First Publication, April, 1904 



Copyright, 1914, l>y 

 WILLIAM T. HORNADAY 



Fireside Edition published September, 1914 



SPECIAL NOTICE 



The publishers hereby give warning that 

 the unauthorized use of illustrations, charts, 

 or maps from this book is expressly forbidden. 



