20 DARWINIANA. 



species stand to one another, .... the limitation of the range 

 of changes which animals undergo during their growth, .... 

 the return to a definite norm of animals which multiply in vari- 

 ous ways, .... the order of succession of the different types 

 of animals and plants characteristic of the different geological 

 epochs, .... the localization of some types of animals upon 

 the same points of the surface of the globe during several suc- 

 cessive geological periods, .... the parallelism between the 

 order of succession of animals and plants in geological times, 

 and the gradation among their living representatives, .... the 

 parallelism between the order of succession of animals in geo- 

 logical times and the changes their living representatives under- 

 go during their embryological growth, 1 .... the combination 

 in many extinct types of characters which in later ages appear 

 disconnected in different types, .... the parallelism between 

 the gradation among animals and the changes they undergo 

 during their growth, . . . . the relations existing between these 

 different series and the geographical distribution of animals, 

 .... the connection of all the known features of Nature into 

 one system " 



In a word, the whole relations of animals, etc., to 

 surrounding Nature and to each other, are regarded 

 under the one view as ultimate facts, or in their ulti- 

 mate aspect, and interpreted theologically ; under the 

 other as complex facts, to be analyzed and interpreted 



1 As to this, Darwin remarks that he can only hope to see the law 

 hereafter proved true (p. 449) ; and p. 338 : " Agassiz insists that 

 ancient animals resemble to a certain extent the embryos of recent 

 animals of the same classes ; or that the geological succession of ex- 

 tinct forms is in some degree parallel to the embryological development 

 of recent forms. I must follow Pictet and Huxley in thinking that the 

 truth of this doctrine is very far from proved. Yet I fully expect to 

 see it hereafter confirmed, at least in regard to subordinate groups, 

 which have branched off from each other within comparatively recent 

 times. For this doctrine of Agassiz accords well with the theory of 

 natural selection." 



