54 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE 
species extends slightly on the sides of the body, and the lower portion of the 
cheeks. 
“This species was caught on the mountains, thickly covered with peat, 
of Hardy Peninsula, which forms the extreme southern point of Tierra del 
Fuego.” — D. 
17. MUS CANESCENS. 
Mus canescens, Waterh., Proceedings of the Zoological Society of London for February, 1837, p. 17. 
M. supra canescens, subtiis albus ; oculis flavido cinctis ; auribus parvulis, pilis pallidh 
Jtavis et plumbeis obsitis ; mystacibus mediocribus, canis, ad basin nigricantibus ; 
caudd vix corpore breviore, supra fusco-nigra, subtiis sordide alba ; pedibus anticis 
tarsisque fiavescentibus. 
Description. — Fur moderately long and loose ; ears small ; tail nearly equal 
to the body in length : general colour gray, with a wash of very pale yellow ; 
chin, throat, and under parts of the body, white. Tail tolerably well 
clothed with hairs, those on the upper surface brown, and those on the 
under, whitish ; on the sides are some yellowish hairs. Ears with yellow 
hairs on the inner side ; tarsi pale yellow, toes white ; muzzle and around 
the eye yellowish. 
In. Lines 
Length from nose to root of tail . .3 6* 
of tail . . . . .21 
from nose to ear . . .11 
Habitat, Santa Cruz and Port Desire, (December.) 
“ Very common in long dry grass in the valleys of Port Desire.” — D. 
The skull is figured in Plate 33, fig. 5, c. Fig. 5, a. represents the molars of 
the upper jaw; fig. 5, b. those of the under jaw, and fig. 5, d. represents the 
posterior molar of the under jaw when more worn. 
It was with some hesitation that I described this as a distinct species in the 
Society’s Proceedings. I have now "re-examined the specimens, and still am 
Length of tarsus (claws included) 
of ear 
* The dimensions given in the Proceedings of the Zoological Society were taken from a younger specimen 
than those here described, and there is an error in the length of the tail there given, which should be 1 — 10 
instead of 2 — 10. 
