HORN EXPEDITION—MAMMALIA. 
35 
such a prominent feature in S. larapinta. The ji^reater proportionate length of the 
foot seems to distinguish it also from both S. murina and S. crassicaudata. 
The general dimensions of the body are more similar to those of S. leucopus, 
but the sole pads are not so markedly striated, and the great swollen tail serves at 
once to distinguish it from this species. 
The specific name is adapted from the native name of the Finke River—the 
Larapinta—in which district it is found, and for the specimens upon which the 
species is founded I am indebted to the kindness of Mr. P. M. Byrne. 
(7) Sniinthopsispsatnniophilus., Spencer.* The sand-hill pouched mouse. 
(Plate I., Figs. 2, 2a, 2b.) 
Size medium. Fur close, long and fine. Dorsal surface dark grey. Ventral 
surface of head and body white. A brownish tinge on the thighs. The hairs on 
the back are of a grey colour basally and darker at their tips. Amongst the long, 
fine hairs are interspersed on the back long, stiff", darker hairs. On the under 
surface of the body the hairs are grey in their basal halves and white in their outer 
halves. On the thigh the white may be replaced by a brown tinge. 
The ears are covered back and front with short, stiff, grey hairs. 
There is a line of white hairs round the eye. 
A small tuft of long, white, bristle-like hairs is placed on the fore-arm just 
above the wrist. 
The hairs of the hands and feet are cream-coloured. 
The haii-s on the soles reach to the pads, except over a narrow median 
granulated space stretching backwards from the base of the toes to the hallux. 
The tail is covered with short, stiff, whitish hairs dorsally and laterally, and 
with a well-marked line of black hairs ventrally. The hairs increase slightly in 
length on the upper and lower surface at the tip, so as to form a slight crest. 
The palms are granulated, with six ill-defined elevations, but no striated pads. 
The soles are hairy; three pads are present at the base of the toes placed on 
granulated elevations, but are not striated. The hallux is small, and lies about 
half-way between the heel and the base of the claws. 
The ears are large, reaching half-way between the eye and the tip of the snout. 
f2 
* Proc. R.S. Viet., vol. vii. (New Series), 1805, p. 222, 
