4. MUS (RATTUS _var._?) INSULARIS.

_M. suprà grisescenti, colore subtùs dilutiore; tarsis

purpureo-nigris: caudâ corpus cum capite æquante: auribus

mediocribus: vellere molli._

DESCRIPTION.—No. 1. The general colour of this animal is what might be

termed black, there is, however, an obscure purple-brown hue on

the upper parts of the body, and the sides and under parts have a

grayish tint, the hairs covering the feet above are of an uniform

deep purple-brown, almost black. All the hairs of the body are

gray at the base: the hairs of the moustaches are long and

numerous, and of a black colour, having one or two white hairs

intermixed: the ears are of moderate size, and very sparingly

furnished with minute dark hairs: the tail is long and slender,

and has small, scattered, bristly hairs, of a brown-black colour.

In. Lines.

Length from nose to root of tail 7 0

of tail 6 6

of tarsus 1 3½

of ear 0 7

from nose to ear 1 6

No. 2. Hairs along the centre of the back chiefly black, and but

obscurely annulated, near the apex, with deep yellow: towards the

sides of the body, and over the haunches, the hairs are more

distinctly annulated, and on the sides of the body they are of a

pale yellow at the apex: on the under parts the hairs are gray,

tipped with dirty yellowish white: the feet are of the same deep

purple-brown hue as in the specimen first described.

The zoology of the voyage of H.M.S. Beagle [vol. 2 of 5] · 第 79 / 144 题