ORG A NIC E VOL UTION. 3 5 



these particular types of structure in other large 

 divisions of that tree. In other words, we never 

 find typical structures appearing except in cases 

 where their presence may be explained by the 

 hypothesis of hereditary descent; while in 

 thousands of such cases we find these structures 

 undergoing every conceivable variety of adaptive 

 modification. 



Consequently, special creationists must fall back 

 upon another position and say, — " Well, but it 

 may have pleased the Deity to form a certain 

 number of ideal types, and never to allow the 

 structures occuring in the one type to appear 

 in any of the others." I answer, undoubtedly it 

 may have done so ; but if it did, it is a most 

 unfortunate thing for your theory ; for the 

 fact implies that the Deity has planned 

 His types in such a way as to suggest the 

 counter-theory of descent. For instance, it 

 would seem to me a most capricious thing in 



D 2 



