THE EVOLUTION OF 

 ANIMAL INTELLIGENCE 



BY 



S. J.I HOLMES, PH. D. 



ASSISTA^I-TOOFESSOR OF ZOOLOGY IN 

 THE UXIVEBSITY OF WISCONSIN. 



QL78S 

 T 

 19(1 



NEW YORK 

 HENRY HOLT AND COMPANY 



1911 



-. 



1 



