58 
ZOOLOGY OF THE VOYAGE OF THE 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 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-brown 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. 
Length from nose to the root of tail 
of tail .... 
from nose to ears 
In. Lines. 
6 9 Length of tarsus (claws included) . 
5 4 of ear .... 
1 8 
Habitat, Maldonado, La Plata (June.) 
In. Lines. 
1 6 
0 7 
This species is about the size of Mus Rattus, but is stouter in its proportions ; 
as in Mus nasutus, the thumb is furnished with a pointed claw. The molars of the 
lower jaw are figured in Plate 34, fig. 11, 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. 
21. Mus Braziliensis. 
Plate XIX. 
Rat du Brezil, Geoff. 
M. supra fuscus fulvo lavatus ; lateribus capitis corporisque ceque ac abdomine auratis ; 
guld pectoreque albis ; pedibus pilis sordidh fiavis tectis ; auribus parvulis ; cauda 
caput corpusque fere cequante ; vellere longo, molli . 
Description. — 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 back, long glossy black hairs are 
thickly interspersed, and produce, with the admixture of the deep golden 
