genus it is placed by Mr. Pennant ; but it has alfo fome 
affinity with thofe fpecies of the Linnaean genus Mus, 
which are furnilhed with hind legs of a very remark¬ 
able length, and fore-legs as remarkably Ihort. One 
of the molt fingular of thefe is the creature called the 
Jerboa, which is the Mus Jaculus of Linnaeus; an 
animal which has the general actions and attitudes of 
a bird; handing on its hind legs, and making ufe ot 
the fore-legs only in feeding and in fcratching or bur¬ 
rowing in the ground. 
The Kanguroo, like the Jerboa, relts only on its 
hittd legs, but the whole mctatarfus ? having the appear¬ 
ance of the tibia, relts on the ground, whereas the 
Jerboa more frequently feems to hand on the feet alone. 
The female Kanguroo is furnilhed with a ventral 
pouch, in the fame manner as the large or common 
Opoilum. 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 hont 
or cutting teeth, ( incijores ,) there are 6 in the upper 
jaw, of a broad fhape, and appear as it approaching 
to a bifid figure, or with a part cut out from the mid¬ 
dle edge (emarginated). In the front ol the lowei ja.v 
are two extremely large, lharp, and firong teeth, whieh 
incline forward. The fore feet are divided into five 
longifh toes, with flmrp claws; but the ftrucfiure of 
the hind feet is extremely remarkable. At firfi view, 
the foot feems to be trida&ylous, or to conlift ot three 
toes- the middle toe is mold uncommonly firong anc 
large, and furnilhed with a claw of proportional 
magnitude ; the fide toes are much taller, and t te 
