72 CLASS MAMMALIA. 



The Muscardin (Mus Avellanarius), Buf. VII. xxvi. 



Of the size of a Mouse; a cinnamon red above; 

 whitish underneath ; the hairs of the tail some- 

 what disposed like the barb of a quill. 



3d. The Rats, whose cheek-teeth, more or less 

 tuberculous, do not so clearly exhibit the transverse 

 furrows. They are more omnivorous than the others. 

 Their sub-genera are more numerous. 



The Hydromys (Geoff. An. du Mus torn. VI. page 86 and 

 following), 



Are distinguished above all the other Rats by their 

 hind-feet, palmate two-thirds ; their molars have 

 also a peculiar character, inasmuch as their coro- 

 nals, obliquely quadrangular, are hollowed in the 

 middle like a spoon. They are aquatic. 



Individuals of this tribe have been sent from 

 Guiana, some with a white belly, others with a fawn- 

 coloured, but all deep-brown on the upper part ; the 

 tail long, black at the base, and white in the posterior 

 moiety. They are sometimes double the size of the 

 Surmulot, (Hydromys leucogaster et H. Chrysogaster, 

 Geoff.) 



It is also thought that we may refer to this genus, 

 an animal of North America, whose skin is abun- 

 dantly used by hatters in Europe, the characters of 

 which, however, have not yet been examined by 

 anatomists. This is 



