ARCTIC FOX. 
are so distant from each other, as to admic in- 
termediate species. The Jackall is an inter- 
mediate species between the Dog and Vv'olf, 
and the Isatis is placed between the Fox and 
Dog. The Tsatis has hiuherto been regarded 
as a variety of the Fox. Bur the description 
given of it by Gmciin, demoastrates it to be 
a diiierent species. 
" The Isatis is common in a'il the northern re- 
gions bordering on the PVczen Sea, and is 
never found on this side of ihe sixty-ninth 
degree of latitude. In the figure of the body, 
and the length of the tail, he is perfectly simi- 
lar to the Fox, but his head has a greater re- 
s'emblance to that of the Dog. His hair is 
softer than tliat of tiie Common Fox ; and his 
far is sometim.es wiiite, and sometimes of a 
Mueisli ash-colour. The head is short in pro- 
portion to the body ; it is broad near the neck, 
and is terminated bv a sharp muzzle. The ears 
are almost round. He has hvc toes, and five 
claws, on the tore- feet, andoniv four on those 
behind. 1'he penis of the male is scarcely 
so thick as a goosc-quill : the testicles wliicli 
aie as largj as almonds, are so concealed by 
the 
