42 LLOYD'S NATURAL HISTORY. 
Hfalmaturus (Thylogale) brevicaudatus, Gray, Ann. Mag. Nat. 
Hist., vol. 1., p. 108 (1838). 
FTalmaturus brachyurus, Gray, in Grey’s Australia, Appendix, 
vol. il., p. 403 (1841). 
Characters.—Size small ; form short and squat ; naked portion 
of muzzle with a central upward projection; fur long, thick, 
and coarse. General colour coarsely grizzled greyish-brown ; 
under-parts slaty-grey ; ears very short and rounded, grizzled 
grey, and thickly haired on the back; feet brown ; tail very 
short, about twice the length of the head, brown above, greyish- 
white beneath. Length of head and body about 23 inches ; 
of tail 10 inches. 
Distribution.—Western Australia. 
This species has often been confounded with the lasi, 
which it resembles in general coloration and proportions, but 
from which it differs by its inferior dimensions, as well as by 
certain well-marked characters of the skull and teeth. Ex- 
ternally it also resembles some of the species of /oforous, 
inhabiting the same districts, but it may always be distin- 
guished from them by its longer feet, larger and relatively 
shorter and thicker head, more hairy ears, and by the grey, 
instead of rufous-tipped under-fur. 
THE ROCK-WALLABIES. GENUS PETROGALE. 
Petrogalea, Gray, Mag. Nat. Hist., vol. i., p. 583 (1837). 
This genus includes six small species distinguished from 
the true Wallabies by the following characters. Region of 
nose entirely naked ; fur on back of neck directed downwards ; 
central claws of hind feet very short, only slightly exceeding 
the pads on the sole in length ; tail long, cylindrical, and thinner 
than in Macropus, thickly haired and tufted at the tip. 
