126 DISCRIMINATIONS CHAP. 



complexity, or indeed of any complexity, 

 may not be constituted after the same 

 manner." Neither do I. Therefore, to 

 escape from an idea so perilous to his 

 philosophy, he asserts his conviction 

 that "to reach by this process (organic 

 evolution) the comparatively well-special- 

 ised forms of ordinary Infusoria must 

 have taken an enormous period of time." 1 

 To find, therefore, Mr. Herbert Spencer 

 now insisting on the actual rapidity, and 

 the still greater conceivable rapidity, 

 of evolution in organisms, is a very 

 instructive change of front. It is for 

 the sake of argument that he takes 

 up this new attitude on an all-import- 

 ant point. Lord Salisbury in his Ad- 

 dress had dwelt on the immensities of 

 time which, on the Darwinian theory, 

 must have been needed to develop 

 "a jelly -sh into a man"; and he had 

 1 P. 481. 



