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Show 58 ZOOLOGY OF TilE VOYAGE OF TilE BEAGLE. inner toe of the fore foot with a distinct, pointed claw; claws rather large, those of the fore feet but slightly arched. Fur rather long, and moderately soft; general tint of the upper parts of the bolly, brown, of the sides of the head and body, grayish, but with a yellow wash ; the lower part of the sides of the body and of the cheeks, the tip of the muzzle, and the whole of the under parts, white; feet dirty white; ears densely clothed with short hairs, those on the inner side chiefly of an ashy-brown colour, and those on the outer side dusky; the hairs of the back are of a deep lead coloUL' at the base, black at the tip, and annulatcd with yellow ncar the tip; the longer hairs, which arc thickly interspersed, are totally black ; on the under parts of the body the hairs are gray at the base, and broadly tipped with white; the upper surface of the muzzle is blackish ; the moustaches are black ; the incisors are yellow. ln. Lines. l n. Lines. Lcn~th from nose to the root of tail of tail Length of t:usus (claws included) of car 0 7 from nose to co.rs Habitat, Maldonado, La Plata (June.) This species is about the size of llfus Rattus, but is stouter in its proportions; a inlllltS ncLSldus, the thumb i furnished with a pointed claw. The molars of the low r jaw are fi gured in Plate 34, fig. 11, a. " This rat was caught in so wet a place amongst the flags bordering a lak e, that it must certainly be partly aquatic in its hubits."-D. 21. Mus BRAZILIENSIS. P LATE XIX. Rat du llrczil, Geoff". lJI. suprafuscus fulvo lavatu ; lateribus cctpitis c01porisque ceque ac abdomine aura tis; •ntld pectoreque albis; pedibus pilis sordide flavis teet is; auribus parvulis; cauda caput corp usque J ere Cl!quanle ; vellere longo, nwlli. Dr:s niPTIO .-Heal! somewhat arched, and rather short; ears small; tail about equal in length to the head and body, measured in a straight line; tarsi laro-e. Fur lono-, and rather soft; general colour deep golden yellow: on the upper surface of the head and the back, long glossy black hairs are thickly inter per ed, and produce, with the admixture of the deep golden |