Permanence and Evolution. 71 



between families of the same breed, would be of 

 weight if we had reason to know that all families 

 of the same breed came from one pair. 



THE DUCK. 



Little need be said on this head beyond what 

 has been said on the fowl and pigeon. We 

 know nothing of the origin of domestic ducks 

 or their breeds. 



About the goose, the turkey, and the guinea- 

 fowl nothing need be said more than that 

 nothing is known as to their origin also. Feral 

 guinea-fowl in the West Indies are more likely 

 derived direct from Africa than from Europe. 



THE PEA-FOWL. 



Darwin, on the faith of several distinct and 

 definite allegations, supposes that the black- 

 winged pea-fowl, Pavo nigripennis, was suddenly 

 produced in England out of the ordinary kind. 

 He quotes five distinct accounts of its having 



