64 GENESIS OF MAN. 



and identical dentition — these are propositions whose demonstra- 

 tion, by the aid of the law of heredity, is as complete and absolute 

 as that of any proposition in Euclid. There is no other way to 

 account for these facts. The chances of these organs being so 

 many independent morphological analogues, produced by adapta- 

 tion to identical conditions, are but as one to infinity. 



Either the dualistic conception of teleological design, i. c, mira- 

 cle, must be admitted, or else there is no alternative from this ex- 

 planation. 



