HORN EXPEDITION-MAMMALIA. 
33 
Sminthopsis imirhia, var. constricta. 
At Oodiiadatta a specimen was secured—unfortunately only a single one— 
which in certain respects may be considered as intermediate between S. niuriiia and 
S. crassicaudata. The head is shorter and broader than in the specimens of the 
latter and the tail longer. On the other hand, it is distinctly incrassated, tliough 
not so markedly so or so stout as in A crassicaudata. 
The foot is proportionately broader than in the latter, measuring 4 mm. across 
the region of the sole pads, which are fairly well developed, but not striated. 
The general colouration is closely similar to that of S. imirina. 
Tlie ears, when laid forward, reach to the anterior canthus of the eye. 
There is a small tuft of white, whisker-like hairs on the posterior face of tlie 
fore-arm just above the wrist. 
It may perliaps, on the whole, be best regarded as a variety of A muriua. 
Dimensions of ? (in al.) 
Head and body ... ... ... ... 71 
Tail ... ... ... ... ... 80 
Hind-foot ... ... ... ... 15-5 
Greatest width of hind-foot ... ... 4 
Ear ... ... ... ... ... 12-5 
(6) Sminthopsis larapinta, Spencer.* 
(Plate II., Figs. 2, 2a, 2b). 
Size small, form light and delicate. Fur very soft and fine, moderately long, 
composed almost entirely of under-fur with few longer dark hairs. 
General colour a mouse-grey, suffused on the dorsal surface with rufous. The 
sides, under surface of the body and head, and upper surfaces of the hands and 
feet are white. 
Ears large ; when laid forward they reach considerably beyond the eye. 
Palms naked, granulated. The posterior external pad is V-shaped, with the 
apex pointing forwards, and is striated. 
A small tuft of white, whisker-like hairs is present on the posterior side of 
of the fore-limb, just above the wrist. 
* Proc. R.S. Viet., vol. viii. (New Series), p. 8. 
