60 Permanence and Evolution. 



with this I agree entirely. As to extinction 

 since the historical period, he says it is unlikely, 

 as man has not yet exterminated the common 

 rock dove even on small islands. 



2nd. This hypothesis implies that several 

 species have been well domesticated, which ex- 

 perience shows to be unlikely. 



3rd. Most of our domestic animals have run 

 wild in different parts of the world, but fancy 

 pigeons have nowhere run wild, though, being 

 transported to all parts of the world, they must 

 among others have been carried to their native 

 home. 



4th. If domestic pigeons descend from several 

 wild stocks, we must suppose that primitive 

 man, either intentionally or by accident, picked 

 out a most abnormal set of pigeons, long-necked, 

 short-billed, etc., and that these have since all 

 become extinct, which he says is a double un- 

 likelihood. 



5th. All the domestic races breed together, 



