PETA17RU8 UKEVICEPS. 
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readily distinguished from the few specimens of P. sciureas, 
with which they were mixed, by their smaller size, and the 
comparatively slender and cylindrical tail. In some few 
specimens the extreme point of the tail was white. 
Pet auras (Belideits) a riel. 
Bel idea ariei. Gould, Proceedings of the Zoological Society for January. 
18-42, Part 10, p. 11. 
General colour of upper parts of head and body ashy grey; a 
black stripe, commencing on the muzzle, extends back nearly 
to the root of the tail; ear with a blackish patch at the base 
externally; Hank membrane dusky above ; the edge, as well 
as the whole of the under parts of the body, pale yellow : 
tail black at the apex. 
Inhabits North Australia; Port Essington. 
In size and proportions this species so closely resembles 
the Petal/n/s breviceps , that I do not think we are justified 
in regarding it as distinct, on account of the slight differences 
which its colouring presents, when compared with the animal 
just mentioned. The differences alluded to consist in the 
upper parts of the body being rather paler, and the under 
parts of a delicate yellow. The tail is cylindrical, as in 
P. breviceps. The fore and bind feet are of a pale yellowish 
tint: a narrow black mark, commencing between the eyes, 
runs along the back, and extends nearly to the root of the 
tail: the eyes are narrowly encircled with black, and a black 
ring surrounds the ear at the hose, but is interrupted at the 
posterior angle, where the lmirs are pale yellow. The upper 
surface of the bead is rather paler than the back, which is of 
a pale ash colour, but indistinctly suffused with yellowish : 
the upper surface of the Hank membrane is blackish, especially 
