518 Dk. Richardson's Characters of 



Dimens. Length of head and body 9 inches ; length of tail 7 

 inches. 



There is a specimen in the Museum of the Zoological Society 

 •which is defective in the tail. 



Hub. The Rocky Mountains. 



6. Cricetus talpoides, cinerascenti-nigefy giila cauddque al- 

 bis, saccis buccarum triangularibus pendulis, auricuMs brevissiinis, 

 pedibus posHcis sub-tetradactylis. 



MoLE-SHAPED HAMSTER, of a giayish black colour, with a white 

 chin, throat and tail ; triangular pendulous cheek-pouches ; very 

 short ears ; and only four perfect toes on the hind feet. 



Dimens. Length of head and body 7^ inches ; of tail I5 inch. 



This animal inhabits the banks of the Saskatcehewan in lat. 52°. 

 and throws up earth like a mole. No specimen was procured by 

 the Expedition, but there is one from Hudson's Bay in the 

 Museum of the Zoological Society from which the above specific 

 character was framed. 



The molar teeth have not been examined, but the animal ap- 

 pears to be referrible to Rafinesque's genus Diplostoma. 



7. Mus LEucopus, CRafinesque,^ cauda longd vesiiid, corpore 

 griseo-lutescente sublus abrupte albo, pedibus albis, auriculis 

 magnis. 



Syn. Mus leucopus, Rafinesque. Harlan, Faun. Amer. p. 151. 



Less than the Mus sylvaticus (Linn.), to which it is very nearly 

 allied. 



Hab. Northern parts of America. It becomes the domestic 

 Mouse wherever a fur post is established. 



8. Arctomys pruinosa, (Pennant,) vellere corporis antice 

 rudiori canescenti ; postice fuscescenti, cauda pilosissima hadid 

 nigrdque. 



Hoary Marmot, with long coarse fur, particularly on the cfeest 

 and shoulders where it is hoary ; hind parts dull yellow ish-browa; 

 tail blackish-brown, bushy. 



