inner toe of the fore foot with a distinct, pointed claw ; claws rather large,
those of the fore feet hut slightly arched. Fur rather long, and moderately
soft; general tint of the upper parts of the body, 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-browm colour, and those on the
outer side dusky ; the hairs of the back are of a deep lead colour at the base,
black at the tip, and annulated with yellow near the tip ; the longer hairs,
which are 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.
Leugtli from nose to the root of tail . 6 9 Length of tarsns (claws included) . . 1 6
of ’-‘''■if . . . . . 5 4 of ear . . . . . 0 7
from nose to ears . . . 1 8
Habitat, Maldonado, La Plata (June.)
This species is about the size of Mus Rattus, but is stouter in its proportions;
as in 3Ius nasutus, the thumb is furnished with a pointed claw. The molars of the
lower jaw are figured in Plate 34, fig. 1 1 , a.
“ This rat was caught in so wet a place amongst the flags bordering a lake,
that it must certainly be partly aquatic in its habits.”—D.
2 1 . Mus B r a z i l i e n s i s .
P late X IX .
R at du Brezil, Geoff.
M. supra fuscus fulvo lavatus ; lateribus capitis corporisque oequè ac abdomine auratis;
gulâ pectoreque albis ; pedibus pilis sordidh Jiavis tectis ; auribus parvulis ; caudâ
caput corpusque fere oequante ; vellere longo, molli.
D e s c r i p t i o n .— Head somewhat arched, and rather short ; ears small ; tail about
equal in length to the head and body, measured in a straight line ; tarsi
large. Fur long, and rather soft; general colour deep golden yellow: on
the upper surface of the head and the hack, long glossy black hairs are
thickly interspersed, and produce, with the admixture of the deep golden
I