122 DARWINISM STATED BY DARWIN HIMSELF. 



Arctic regions of the Old and New Worlds, and on many 

 isolated mountain-summits far distant from each other. 



Thus we can understand the identity of many plants 

 at points so immensely remote as the mountains of the 

 United States and those of Europe. 



THE THEOKY OF CREATION INADEQUATE. 



_ „„, As on the land, so in the waters of the sea, 



rage 334. ... . 



a slow southern migration of a marine fauna, 



which, during the Pliocene or even a somewhat earlier 

 period, was nearly uniform along the continuous shores of 

 the Polar Circle, will account, on the theory of modifica- 

 tion, for many closely allied forms now living in marine 

 areas completely sundered. Thus, I think, we can under- 

 stand the presence of some closely allied, still existing and 

 extinct tertiary forms on the eastern and western shores 

 of temperate North America ; and the still more striking 

 fact of many closely allied crustaceans (as described in 

 Dana's admirable work), some fish and other marine ani- 

 mals, inhabiting the Mediterranean and the seas of Japan 

 — these two areas being now completely separated by the 

 breadth of a whole continent and by wide spaces of ocean. 

 These cases of close relationship in species either now 

 or formerly inhabiting the seas on the eastern and west- 

 ern shores of North America, the Mediterranean and 

 Japan, and the temperate lands of North America and 

 Europe, are inexplicable on the theory of creation. "We 

 can not maintain that such species have been created 

 alike, in correspondence with the nearly similar physical 

 conditions of the areas ; for, if we compare, for instance, 

 certain parts of South America with parts of South Africa 

 or Australia, we see countries closely similar in all their 

 physical conditions, with their inhabitants utterly dis- 

 similar. 



