NATURAL SELECTION CRITICISED. 277 



questioned," Mr. Darwin avows, " whether it is in any 

 other place an aboriginal." One asks with astonishment, 

 then where did it come from ? No South American type 

 will account for it here. And, pullulation of individual 

 differences ; are we to suppose that it pullulated out of 

 the bare rock ? 



Altogether, neither in the Galapagos, nor, in general, 

 anywhere else, can Mr. Darwin put us at home with 

 mere incidental variation, mere pullulation of differences, 

 as the satisfactory and convincing origin of species. 



