442 Darwin, and after Darwin. 



of time on the one hand, and with degrees of evolution, of 

 change of environment, &c., on the other. Or, in the 

 words of Le Conte, when dealing with this very subject, " It 

 is impossible to conceive a more beautiful illustration of 

 the principles we have been trying to enforce l ." 



1 Evolution and its Relation to Religious Thought, p. 194. 



