The molars of the upper jaw are figured in Plate 34, fig. 13, _a_, and
those of the lower jaw, fig. 13, _b_.
“Caught in the interior plains of Patagonia in lat. 50°, near the banks
of the Santa Cruz.”—D.
23. MUS GRISEO-FLAVUS.
PLATE XXI.
Mus griseo-flavus, _Waterh._, Proceedings of the Zoological Society of
London for February 1837, p. 28.
_M. suprà griseus flavo-lavatus, ad latera flavus, subtùs albus;
pedibus albis; auribus magnis et ferè nudis; caudâ caput corpusque
ferè æquante, suprà fusco-nigricante, subtùs albâ; vellere longo,
molli._
DESCRIPTION.—Ears large; tail rather shorter than the head and body
taken together; tarsi slender, and moderately long; fur long and
very soft; general tint of the upper parts of head and body
grayish, washed with brownish yellow; on the sides of the body a
palish yellow tint prevails; feet, chin, throat, and under parts
of body pure white; tail rather sparingly clothed with hairs,
those on the apical portion rather long, and forming a slight
pencil at the tip; on the upper side and at the tip of the tail
the hairs are brown, on the under side they are dirty white; the
ears are very sparingly clothed with minute brownish yellow hairs
internally; externally, on the fore part, the hairs are rather
longer and of a brown colour; the upper incisors are orange, and
the lower incisors are yellow; the hairs of the moustaches are
long, and of a black colour; the hairs of the back are deep gray
at the base, brownish at the tip, and annulated with pale brownish
yellow near the tip; the longer hairs are brown; the hairs of the
belly are white externally, and gray at the base; on the throat
the hairs are white to the root.
In. Lines.
Length from nose to root of tail 6 8
of tail 5 6
from nose to ear 1 4½
of tarsus (claws included) 1 2½
of ear 0 8