MAMMALIA. 
47 
moustaches are rather short and slender, and of a brownish colour. Thumb 
nail small and rounded. 
Length from nose to root of tail 
„ of tail 
from nose to ear 
In. Lines. 
3 9 Length of tarsus 
4 1^ of ear 
1 0 
An. Lines. 
1 0 | 
0 
Habitat, Maldonado, La Plata, (June.) 
This species is slightly larger than the common mouse ; the head is rather 
larger in proportion ; the ears are rather smaller and more distinctly clothed with 
hair ; the tail and tarsi are much longer in proportion. Its bright yellow colouring 
and proportions distinguish it from any of the species described in this work. Of 
this animal I do not possess the skull, nor of the teeth do I possess more than the 
first and second molars of the upper jaw, and the second and last of the lower 
jaw. These are figured in Plate 34, figs. 5. a, and 5. b. 
Mus Magellanicus. 
Plate XI V. 
Mus Magellanicus, Bennett , Proceedings of the Zoological Society of London for December 1835, p. 191. 
M. supra fuscus, subtits cinerescenti-albus, pallid 'b Jlavo lavatus ,* auribus mediocribus 
pilis fuscis obsitis ; cauda corpus caputque (equante; tarsis longis, pilis sordide 
albis obsitis. 
Description. — Fur very long and moderately soft, general colour deep brown; 
the hairs of the ordinary fur are gray, tipped with yellowish brown ; the 
longer hairs are black ; the sides of the body are yellowish ; the under parts 
are gray-white with a faint yellowish tint, each hair being gray tipped with 
yellowish white. The ears are rather small, well clothed with hairs ; those on 
the inner side are blackish tipped with yellow, and on the outer side they are 
blackish on the fore part and dusky on the hinder part. The fore feet are of 
moderate size, the thumb nail is short and rounded ; the tarsi are rather 
long ; both fore and hinder feet are of a brownish colour, and covered above 
with dirty gray hairs. The tail rather exceeds the head and body in length ; 
it is brown above and dirty white beneath. The hairs of the moustaches are 
numerous and long, of a brownish colour at the apex and black at the base. 
