THE MOUSE TRIBE. 
123 
of which there are three in the first tooth of the series, and two in each of the 
others. The incisor teeth are very broad, with smooth front surfaces. The muzzle 
is unusually short, the profile convex, and the ears rather small; while the feet are 
characterised by their great breadth, and the large size of their claws. The tail is 
shorter than the head and body, and sparsely-haired. The hair is rather long and 
coarse, and darker on the muzzle, the sides of the face, the hack of the head, the 
shoulders, and the fore-part of the back than elsewhere. 
The Hamsters and White-Footed Mice. 
Genus Cricetus. 
The well-known hamsters of the Old World, together with the American 
white-footed mice, constitute an extensive genus of murine Rodents, which, with 
others, represents a distinct subfamily. These Cricetines, as all the members of 
THE HAMSTER (.'j liat. size). 
the subfamily may be called, are characterised by the crowns of their molar teeth 
carrying a number of distinct tubercles or cusps, which in the upper jaw are 
arranged in two longitudinal rows separated by a median groove ; these teeth being 
always implanted in the jaw by distinct roots. The whole of the Old World 
Cricetines are characterised by the shortness of their tails; but in some of the 
