7G CLASS MAMMALIA. 



seven feet in depth. It is common in all the 



sandy regions which extend from the North of 



Germany as far as Siberia. 



This last country produces many small species of 



the Hamster, discovered and published by M. Pallas. 



Such as M. Accedula, Arenarius, Phoeus, Songarus, 



Furunculus, Pall. Glir. et Schreb. 



One of the most extraordinary species, if it were 

 completely authenticated, would be theMus Bur 'sarins 

 of Shaw, aboriginal in Canada, ash-coloured, whose 

 pouches, when they are full, would jut out from the 

 two sides of the mouth, and surpass the head in size. 

 It is said to have five claws in front, of which the 

 middle three are very long, and fit for digging; 

 there are four behind ; the tail is short, and its size 

 approaches that of the Surmulot. 



The Jerboa (Dipus, Gm.) 



Have the same teeth as the Rats ; a long tail tufted 

 at the end ; a large head ; large projecting eyes ; 

 and, above all, the posterior extremities of a dis- 

 proportioned size in comparison of those in front : 

 this circumstance caused them to be named two- 

 legged Rats by the ancients. In fact, they proceed 

 in general by long leaps on their hinder feet ; the 

 fore-feet have five toes ; in the hinder, the meta- 

 tarsus of the three middle toes, is formed only of a 

 single bone, like that which is called the tarsus in 

 birds. There are moreover in certain species small 



