PETROGALE. 49 
2, PETROGALE INORNATA, Gould (1842). 
Plain-colored Rock-Wallaby. 
Size medium. General color above sandy-gray ; below sandy- 
white. Face markings indistinct. ars sandy-gray. A dusky 
red patch behind the elbow. No shoulder or flank markings. 
Basal half and greater part of the sides of the tail sandy-brown, 
the remainder black. 
Dimensions.—Head and body about twenty-three inches ;- tail 
about twelve inches. 
Habitat.—North coast of Australia. 
References.—Thomas, B. M. Catal. p. 70; Gould, Mamm. 
Austr. ii. pls. xlv., xlvi. 
3. PETROGALE BRACHYOTIS, Gould (1840). 
Short-eared Rock-Wallaby. 
Size medium ; form light and slender. Fur short and thin. 
General color above grayish-fawn, below grayish-white. Face 
markings almost obsolete. Ears very short, their backs fawn- 
gray, their edges and extreme tips white. Body markings present 
but not prominent ; a dark brown blotch behind the elbow, suc- 
ceeded by a whitish band. Limbs pale gray. Tail gray above, 
whitish below ; the terminal fourth below tufted with longer dark 
brown hairs. 
Dimensions.—Head and body about twenty-two inches ; tail 
about sixteen inches. 
Habitat. —North-west coast of Australia. 
References.—Thomas, B. M. Catal. p. 69, pl. xii. fig. 2 (upper 
view of skull); Gould, Mamm. Austr. ii. pl. xlvii. 
4, PETROGALE LATERALIS, Gould (1842). 
West Australian Rock-Wallaby. 
Size medium ; form slender and light. Fur long, soft, close, of 
a rather woolly texture. General color above light gray, below 
yellowish-gray. A well defined dark whisker-mark with a whitish 
or yellowish cheek-stripe below. A narrow black or brown stripe 
from the occiput to the centre of the back. Ears short, the inside, 
base and extreme tip of outside yellow, the rest brown. A 
prominent black or brown mark behind the elbow, succeeded by 
a white stripe running down to the hip. Front of knee brown, 
connected by a brown band to shoulder spot. Arms, legs, and 
feet gray ; fingers and toes black. Tail gray for the proximal, 
black for the terminal half. 
Dimensions.—Head and body about twenty-four inches ; tail 
about seventeen inches. 
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