»8 RODENTIA. 



with fine hairs of brown-grey, mixed with others of a rusty 

 yeEow shade ; the tail, which is more than one-third of 

 the body in length, is not narrowed near the base ; it is 

 clothed above with small dark brown hairs, beneath with 

 white hairs tipped with grey. The fur of the body is dark 

 rusty brown above, light grey with a yellowish tinge on 

 the sides, and underneath a decided white, contrasting with 

 the darker colour of the sides ; the tips of the hairs on the 

 back have a metallic gloss. The young animals are duller 

 in colour than the adults. The head is more lengthened 

 than in the other species, being shaped like that of the 

 Rat. 



Entire length, 6 inches 7 lines, exclusive of the tail, 

 which is 1 inch 10 lines. — F. M. 



Found by Professor Blasius in 1840 in the North of 

 Russia, on the Dwina ; has been obtained also from Nor- 

 way, the Baltic Provinces of Russia, and from Siberia, as 

 well as from Southern Russia. 



Arvicola Savii. 



Arvicola Savii, De Selys, Micromm. 



Arvicola ineertus, De Selys, 1 840 ; P. Gervais, Zool. et Paleontol. 



Franc. 

 A. arvalis, Buon. Faun. Ital. (figured). 



Dbsceiption. — With fourteen pairs of ribs, shaped like A. 

 arvalis. Ears much shorter than the fur, which is of an 

 earthy greyish-brown colour above, and ashy beneath ; in 

 some individuals the head and back are obscurely red- 

 brown ; the snout is thick and blunt ; eyes very small ; tail 

 rather less than one-third of the length of the body, hairy, 

 brown above, whitish below ; feet greyish white, with rather 

 strong nails ; the thumb less rudimentary than in A. arvalis 

 and the other nearly allied species. The teats are four in 

 number, none of them pectoral. 



