NATURE SERIES. 



DEGENERATION 



CHAPTER IN DARWINISM. 



RY 



PROFESSOR E. RAY LANKESTER, F.R.S., 



FELLOW OF EXETER COLLEGE, OXFORD. 



MACMILLAN AND CO. 



1880. 



Z/^v Kig^ht of Traftslah'otr n»d Feproc^ucHcff is ResriTrd 



