ORDER RODENTIA. 69 



on the fore-feet, like the Rat-Moles, and Leaping- 

 Hares. 



The Lemming (Mus Lemmus, Lin.), Pall. Glir. XII. A.^ B., 

 Schreb. cxexv. 



A northern species, of the size of a Rat, with 

 fur diversified with yellow and black. Very 

 celebrated for the migrations which they make 

 from time to time, without any fixed period, 

 and in innumerable troops. They are said to 

 march in a right line, neither river, mountain, 

 nor any other obstacle impeding their passage ; 

 while they carry devastation into all the lands 

 through which they pass. Their usual habitat 

 seems to be the shores of the Icy Sea. 



The Zocor (Mus Aspalax, Gm.), Pall. Glir. X. Schreb. ccv. 



Reddish-gray ; the three middle claws of 

 the fore-feet long, crooked, compressed, and 

 trenchant, for cutting the soil and roots. The 

 limbs short ; scarcely any tail ; and the eyes 

 excessively small. It is a native of Siberia, 

 where it always lives underground like the 

 Moles and Rat-Moles, and subsists principally 

 on liliaceous bulbs of various kinds. 

 The third species, like all the other animals, com- 

 prised under the grand genus of Rats, has but the 

 rudiment of a thumb on the fore-foot. This is 



The Lemming of Hudson's Bay (Mus Hudsonius, Gm.)^ 

 Schreb. cxcvi. 



Of a clear pearly ash-colour, without tail or 



