

MENTAL EVOLUTION 

 IN ANIMALS. 



BY 



GEORGE JOHN ROMANES, M.A., LL.D., F.R.S., 



ACTHOR OF M ANIMAL INTELLIGENCE." 



WITn A 



POSTHUMOUS ESSAY ON INSTINCT. 



BY 



CnARLES DARWIN, M. A., LL.D., F.R.S. 



NEW YORK: 



D. APPLETON AND COMPANY, 



1, 3, and 5 BOND STREET. 



1884. 



