FAUNA AMERICANA. I5.'i 



Species. 



I. Pseiidostoma bur sarins, Shaw, Trans. Lin. 

 Soc. Lond. and General Zool. vol. ii. part 1. p. 

 100. pi. 138. under the name of Canada Rat. 



Mas bicrsarius, Lin. Trans, vol. v. p. 227. pi. 8. 



Mils saccatus, Mitchill, Med. Repos. 1821. 



Geomys cinereus, Rafinesque, Monthly Mag. 

 1817, p. 45. Vulgarly Sand-rat, Goffer, Pouched- 

 rat, Salamander, &c. 



Char. Essent. Body covered with reddish- 

 brown hair, plumbeous at base ; feet white ; ante- 

 rior nails elongated; posterior ones short, and 

 concave beneath. 



Dimensions. Total length from nine to eleven 

 inches. 



Descrii'tion. Bod}^ elongated, subcylindrical ; 

 hair reddish-brown, plumbeous at base; rather 

 paler beneath ; cheek pouches capacious, covered 

 with hair both within and without ; eyes black ; 

 ears hardly prominent ; feet five-toed, white ; an- 

 terior hair robust, with large, elongated, somewhat 

 compressed claws ; middle nail much the longest, 

 then the fourth, then the second, then the fifth, 

 the first being very short ; posterior feet slender ; 

 nails concave beneath, rounded at tip, the external 

 one very small ; tail short, hairy at base, nearly 

 naked towards the tip. 



Habit. Walking awkwardly, but burrowing 

 with great rapidity, so that the difficulty of ob- 



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