216 MOSTLY MAMMALS 
of skins sold by the latter body reached 1,451. It is note- 
worthy that in the fur trade Greenland blue fox skins are 
well known to be of the same fine-haired quality as the 
white skins from the same locality, while the Alaskan blue 
skins are equally coarse-haired. Consequently there is 
presumptive evidence of the existence of a Greenland and 
an Alaskan race of the species; and, as a matter of fact, 
American naturalists have recently split up the Arctic fox 
into several distinct forms, some of which are regarded as 
species. 
