DARWIN, AND AFTER DARWIN 



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CGLLEGF GF GG 

 p|-jYf- [Of f- IT. ' 



AN" EXPOSITION OF THE DARWINIAN THEORY 



AND A DISCUSSION OF 

 POST-DARWINIAN QUESTIONS 



BY THE LATE 



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



Honorary Fellow of Gonville and Cains College, Cambridge 



III 



POST-DARWINIAN QUESTIONS 



ISOLATION 

 AND PHYSIOLOGICAL SELECTION 



Chicago 



THE OPEN COURT PUBLISHING COMPANY 

 1897 



