60 THE SCIENTIFIC EVIDENCES OF 



deeper channels, we can understand how it is 

 that a relation exists between the depth of the 

 sea separating two mammalian faunas, and the 

 degree of their affinity — a relation which is quite 

 inexplicable on the theory of independent acts 

 of creation." 



So much, then, for the argument from geographi- 

 cal distribution — the many facts of crucial import- 

 ance which it affords almost resembling so many 

 experiments devised by Nature to prove the falsity 

 of the special creation hypothesis. For now, 

 let it in conclusion be observed, that there is no 

 physiological reason why animals and plants of 

 the different characters observed should inhabit 

 different continents, islands, seas, and so forth. 

 As Darwin observes, " there is hardly a climate 

 or condition in the Old World which cannot be 

 paralleled in the New .... and yet how 

 widely different are their living productions." 

 And that it is not the suitability of organisms 



