GERBILLUS TENUIS.— Smith. 
Mammalia. — Plate XXXVI. Fig. 2. 
G. capite, dorso, latcribus, cxtremitatibusque externe pallide rubro- aurantus, dorso brunneo- 
penicillato; partibus inferioribus cxtremitatibusque interne versus corpus albis ; oculisrubro- 
brunneis. 
Longitudo ab apice nasi ad basin caudse 4 unc. ; caudee unc. 
Colour.— The head, the back, the sides, and the outer surface of the 
extremities a clear pale reddish orange ; the hack freely pencilled with liver- 
hrown ; the hairs towards their root dull lavender-purple ; chin, throat, belly, 
and inner surface of limbs pure white ; tarsi pale ochrey white. The line of 
demarcation between the colours of the sides and belly distinctly defined. 
Tail the same colour as the back, only lighter, and towards its point many 
of the hairs are of an umber-brown tint. Ears internally a pale flesh 
colour, externally, pale yellowish brown. Eyes deep reddish brown. Claws 
pale wood-brown. Incisor teeth of upper jaw pale Dutch-orange, of lower 
jaw pale straw-yellow. 
Form, &c. Figure slender and moderately lengthened ; head rather small 
and anteriorly attenuated ; the apex of the nose rather acute. Eyes large ; 
ears moderately long and oval : whiskers very long, and towards their origin, 
rigid. Hair of the muzzle short and rather strong, that covering the rest of 
the head, the body, and the extremities, as far as the tarsi, long, soft, silky, 
and recumbent. The hair disposed along the centre of the back not quite 
so soft as the rest ; hair of tarsi and toes very short and rigid. Tail slender, 
cylindrical, and tapering, the hair dense, rigid, and very short, except at the 
noint, where it is lengthened and forms a thin tuft. Fore-legs short, hinder 
jeg S long ; toes moderate ; nails pointed, vertically compressed, slightly arched, 
and those of the fore-feet longest. 
Teeth &c Incisors of upper jaw incurved, moderately strong, and with 
sharn-cuttiim points : they protrude about a line-and-a-half beyond the alveoli, 
and each anteriorly along its middle, is marked with a deep longitudinal 
furrow; the incisors of the lower jaw are slender, considerably longer than 
