426 



DARWINISM 



CHAP. 



produced by some other power, then natural selection is not 

 wanted. If, on the other hand, both fit and unfit are produced, 

 and natural selection decides between them, that is pure Dar- 

 winism, and Mr. Cope's theories have added nothing to it. 



Fig. 35. — Transformation of Artemia salina to A. Milhausenii ; 1, tail-lobe of A. salina, 

 and its transition through 2, 3, 4, 5, to 6, into that of A. Milhausenii ; 7, 

 post-abdomen of A. salina ; 8, post-abdomen of a form bred in brackish 

 water; 9, gill of A. Milhausenii ; 10, gill of A. salina. (From Schmanke- 

 witsch.) 



Semper on the Direct Influence of the Environment 



Another eminent naturalist, Professor Karl Semper of 

 Wiirzburg, also adopts the view of the direct transforming 

 power of the environment, and has brought together an 



