82 Permanence and Evolution. 



collected of the occurrence of exceptional black 

 or white specimens of animals whose normal 

 colour is different, is anything really known 

 about their pedigree. It tells us nothing to 

 know that they came from the same brood 

 as others of ordinary colour, unless we know 

 what was the tint of the parents. 



Compare the blue-rumped form of the rock 

 dove, which in domestication has never received 

 a separate name or been considered even as 

 a distinct sub-breed, how wild would have 

 seemed the notion of a separate source for 

 this form if it had not been known to be a fact. 

 The same may be said as to the black-breasted 

 red game with red and white ear-lappets, which 

 marks characterise respectively the Indian and 

 trans-Indian local races of Gallus ferrugineus. 



The Corsican and Sardinian varieties of 

 moufflon differ chiefly in colour, and if they 

 were known only in domestication it would 

 seem quite absurd to suppose for them two 



