genus it is placed by Mr. Pennant ; but it has alfo fome 

 affinity with thofe ipecies of the Linnaean genus Mus, 

 which are furniflied with hind legs of a very remark- 

 able length, and fore-legs as remarkably fliort. One 

 of the mod fingular of thefe is the creature called the 

 Jerboa, which is the Mus Jaculus of Linnaeus; an 

 animal which has the general acftions and attitudes of 

 a bird; ftanding on its hind legs, and making ufe of 

 the fore-legs only in feeding and in fcratching or bur- 

 rowing in the ground. 



The Kanguroo, like the Jerboa, refts only on its 

 hind legs, but the whole metatarfus ? having the appear- 

 ance of the tibia, refts on the ground, whereas the 

 Jerboa more frequently feems to ftand on the feet alone. 

 The female Kanguroo is furniflied with a ventral 

 pouch, in the fame manner as the large or common 

 Opoffum. In each jaw there are 4? grinding teeth, 

 or dentes molares ; thefe are fituated backwards, at a 

 diltance from the front-teeth. Of thefe, viz. the front 

 or cutting teeth, {incijores,) there are 6 in the upper 

 jaw, of a broad fhape, and appear as if approaching 

 to a bifid figure, or with a part cut out from the mid- 

 dle edge (emarginated). In the front of the lower jaw 

 are two extremely large, fharp, and ftrong teeth, which 

 incline forward. The fore feet are divided into five 

 longifh toes, with fharp claws ; but the ftructure of 

 the hind feet is extremely remarkable. At firft view, 

 the foot feems to be tridadlylous, or to confift of three 

 toes; the middle toe is moft uncommonly ftrong and 

 large, and furniflied with a claw of proportional 

 magnitude ; the fide toes are much fmaller, and the 



claw 



