JACKALL POX. 
257 
throughout the Rocky Mountain regions, although by no means abundantly, 
as far north as the traders of the fur companies push their outposts. It is 
found also in Oregon. 
GENERAL REMARKS. 
The exploring expedition sent by the United States, (1838 to 1842) did 
not procure any specimens of this Pox, although we find by Mr. Peale’s 
Catalogue, they obtained the Yulpes Yirginianus, in both Oregon and 
California. 
vol. hi.— 33. 
