THE GREYHOUND FOX. 



191 



- 



says, " the ears of the greyhound-fox are long and erect, and 

 his aspect wild."* But, after all, the differences pointed out are 

 not sufficiently striking even to constitute varieties, much less 

 distinct species. The case is exactly like that of the hog-badger 

 and dog -badger, distinctions already noticed and refuted. 



THE NORTH AMERICAN BLACK OR SILVER Fox. 



(Canis argentatus.}\ 



Cuvier and Geoffrey St. Hilaire regarded this animal as 

 distinct from the common fox ; but Dr. Richardson and Mr. 

 Bennett consider it to be merely a variety of the latter. 



* History of Quadrupeds (Newcastle-upon-Tyne, 1790), p. 269. 

 f Gmelin has confounded it with the black wolf. (C. Lycaon.) 



