DARWIN, AND AFTER DARWIN 



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 Caius College, Cafnbridge 



III 



POST-DARWINIAN QUESTIONS 



ISOLATION 



AND PHYSIOLOGICAL SELECTION 



THE OPEN COURT PUBLISHING COMPANY 

 1897 



