PETROGALE INORNATA, Gould. 
Unadorned Rock Wallaby. 
Spec. Char.—P. facie et dorso arenaceo-cinereis ; humeris canescente irroratis ; lateribus pallidioribus absque notis con- 
spicuis ; antibrachüs tarsisque arenaceo-cinereis, digitis ad apicem saturate fuscis; caude dimidio basali arenaceo- 
fusco. 
Descr.—General colour of the upper parts sandy grey, grizzled over the shoulders, and becoming much lighter on the 
flanks; an indistinct line of a lighter hue along the face under the eye; a dusky red patch behind the elbow ; 
under surface sandy white inclining to rufous on the lower part of the abdomen; arms and tarsi sandy grey 
passing into dark brown at the extreme tips of the toes; basal half of the tail sandy brown, the remainder 
black, the former colour extending along the sides of the tail for some distance towards the tip; ears sandy grey, 
bordered by a very narrow line of dark brown on their inner edge; a dark patch at the occiput passing into a 
dark line down the forehead. | 
Female. 
feet. inches. 
Length from the tip of the nose to the extremity of the tail . . . . 3 2 
wœ TET ee ee. A ocv suum cri 32 
» -p tarsus and toes, Including the nails. . . . ما‎ . . 51 
» Gi RED and hand chida) TED. ue s: m 5 
» رو‎ face from the tip of the nose to the base of the ear 41 
He aR 1 
Petrogale inornata, Gould in Proc. of Zool. Soc., for January 11, 1842. 
This new species, for which I am indebted to the kindness of B. Bynoe, Esq., of H.M.S. Beagle, differs from all the 
other members of the genus in the unusual unformity of its colouring. Mr. Bynoe collected it on the north coast of 
Australia. In size it is about equal to the P. lateralis of the western coast, to which, as also to P. penicillata, it is 
very nearly allied, but differs from both in being destitute of any markings on the sides, in the absence of any dark 
colouring behind the ears, and in the light colouring of the arms and tarsi. 
