nguiculatus_
from Chinese Mongolia, in which the lachrymal process is united to
the frontal.

NO. 320. GERBILLUS ERYTHRURUS.
_The Red-tailed Jerboa-Rat_.

HABITAT.--Afghanistan and Persia.

DESCRIPTION.--Rufous brown above, with a few long black hairs, more
numerous on the rump and thighs; under fur slaty; under-parts white,
gradually blending with the colour of the sides; ears much larger
than in the last species, hairy outside and near the margin inside;
soles of hind feet and toes thickly covered with hair, except on the
hinder half of the tarsus; tail very rufous--brown with a black tip,
black hairs are scattered along the upper surface, and form a black
band towards the end above, finally covering the whole tip.

SIZE.--Head and body, about 6 inches; tail, equal.

Mr. Blanford, to whose 'Eastern Persia' I am chiefly indebted for
the above description, writes: "From _G. Hurrianae_, which Jerdon
thought might probably be the same, the present form is distinguished
by its much larger ears and by the hind feet, and especially the toes,
being more thickly covered with hair beneath; the fur too is longer
and the colour browner on the back; the tail is more rufous, and the
tip blacker; the skull is larger and broader; the nasal portion more
elongate and less concave above, and the hind upper molar has a
distinct talon, or rudimentary second transverse ridge, in young
specimens, traces of which may be detected in the form of the worn
tooth."

Its habits are similar to those of the last species.

NO. 321. GERBILLUS NANUS.
_The Dwarf Jerboa-Rat_.

HABITAT.--Baluchistan.

DESCRIPTION.--The fur is soft and long, rufous brown or fawn colour
above, white below, the colours being less sharply distinguished
than in _G. Indicus_; the hairs of the upper parts have no black tips,
and the basal two-thirds are slaty grey. There is a broad white
supercilium in front, joining the white area of the sides of the face,
so that the brown of the nose is reduced to a rather narrow band;
ears almost naked, a few short whitish hairs near the edge only;
whiskers nearly all white; a few of the upper hairs brown near the
base; feet white above, naked beneath, tail light brown above,
whitish beneath; towards the end a band of darker brown hairs runs
along the upper portion, those at the end lengthened; but there is
a less marked tuft than usual, and there are no black hairs at the
end (Blanford's 'Eastern Persia,' vol. ii. p. 72, _