MAMMALIA. 
65 
the base, broadly annulated with pale cinnamon yellow near the apex, and 
brownish at the apex ; the hairs of the belly are deep-gray at the base, and 
white externally, those on the throat are pale gray at the base. 
Length from nose to root of tail 
of tail 
from nose to ear 
In. Lines. 
6 0 Length of tarsus (claws included) . 
. 4 9 of ear ... 
I 4i Width of ear . 
In. 
1 
0 
1 
Lines. 
11 
HI 
0 |* 
Habitat, Coquimbo, Chile, {May.) 
This species is evidently allied to the two preceding ; and perhaps the “ Rat 
quatrieme, on Rat oreillard” of Azara, {Mus auritus , Desm.) will form one of this 
little group. The molar teeth of the upper jaw are figured in Plate 34, fig. 17, a — 
those of the lower jaw, fig. 17, b. 
“ Inhabits dry stony places.” — D. 
26 . Mus Galapagoensis. 
Plate XXIV. 
31. supra fuscus, jlavo-lavatus, ad latera flavescens, subtiis albus : pedibus pilis sordide 
albis tectis : auribus mediocribus ; caudd, quoad longitudinem , caput corpusque fere 
op quant e : vellere longo. 
Description. — Ears moderate, slightly pointed ; tarsi moderate ; tail slender, 
nearly as long as the head and body ; fur long, and not very soft ; upper 
parts of the body of a brownish hue, a tint produced by the admixture of 
black and palish yellow hairs ; on the sides of the body the longer black 
hairs are less abundant, and the prevailing colour is yellow ; under parts of 
the body white, with a very faint yellow tint; feet furnished' above with dirty 
white hairs ; ears rather sparingly clothed with hairs, those on the inner side 
of a yellow colour, and those on the outer side dusky ; tail above brown, and 
beneath whitish ; the hairs of the moustaches black ; the incisors deep yel- 
low ; the hairs on the back are deep gray at the base, broadly annulated with 
palish yellow near the apex, and blackish at the apex ; the longer hairs 
black ; on the belly the hairs are gray at the base, and broadly tipped with 
yellowish white. 
* It is not easy to measure the width of the ears in these animals : upon measuring with a thread over the 
curve of the outer side I have found the width of the ears of the present animal to be as above given, — the 
dimension slightly exceeding that stated in the Proceedings of the Zool. Soc. 
K 
