ARCTIC FOX. 
the hair that it is difficult to perceive them. 
The hair over the whole body is about two 
inches long ; it is smooth, bushy, and soft as 
wool. The nostrils and under lip are naked, 
and the skin of these parts is black. 
" In both male and female, the stomach, 
viscera, intestines, and spermatic vessels, are 
similar to those of the Dog : tliere is even a 
hone in the penis of the male, and the wliole 
skeleton resembles that of a Fox. 
The voice of the Isatis partakes of tlie 
barking of a Dog and the yelping of a Fox. 
The merchants vvho deal in furs distinguish 
two kinds of Isatis ; the one white, and the 
other of a blueish ash-colour. I'he latter are 
^most esteem.ed, and their price advances in 
proportion to their blueness or brovvnness. 
1'his difference of colour is not sufficient to 
constitute a difference of species ; for M. 
Gmelin was assured, by the most experienced 
hunters, that in the same litter some of the 
young are white and otliers asli-colourcd. 
I The Isatis is an animal peculiar to the 
northern 
