THE ROCK-WALLABIES, 45 
Characters.—Size medium ; form slender and light ; fur long, 
soft, close, and of a rather woolly texture. General colour 
light grey, with the under-parts yellowish-grey ; a well-defined 
dark whisker-mark, with a whitish or yellowish cheek-stripe 
below ; a narrow brown or black stripe from the back of the 
head to the middle of the back; ears short, with the inside, 
base, and extreme tip of outside yellow, and the remainder 
brown ; a prominent black or brown mark behind the elbow, 
followed by a white stripe down the hip; front of knee brown, 
and connected by a brown band with the shoulder-spot ; legs 
and feet grey ; toes black; tail grey for the basal, and black 
for the terminal half. Length of head and body about 24 
inches ; of tail 17 inches. 
Distribution.—West Australia. 
Habits.— Differing from the common Brush-tailed Wallaby in 
its smaller size, the greyer fore-quarters, the more distinct black 
mark on the back, the black and white markings on the flank, 
and the somewhat less bushy tail, this West Australian re- 
‘presentative of the genus is only to be met with in those parts 
of the interior which are rocky and well supplied with caverns. 
In disposition it is remarkably shy, seldom venturing out dur- 
ing the day, and feeding at night on the open patches 
of grass which occur here and there among the rocks. 
According to Gould, it never strays more than two or three 
hundred yards from its retreats among the rocks ; while, when 
_ alarmed, it leaps with the most surprising agility and speed from 
rock to rock. 
Ill SHORT-EARED ROCK-WALLABY. PETROGALE BRACHYOTIS. 
Macropus (Petrogale) brachyotis, Gould, Proc. Zool. Soc., 1840, 
p. 129. 
Petrogale brachyotis, Gould, Monogr. Macropodide, pl. vi. 
(1841); Thomas, Cat. Marsup. Brit. Mus., p. 69 (1888). 
