50 PETROGALE. 



Habitat. West Australia . 



References. Thomas, B. M. Catal. p. 68, pis. ix. fig. 8 (upper 

 front teeth), x. fig. 1 5 (fourth premolar), xii. fig. 3 (upper mew of 

 skull); Gould, Mamm. Austr. ii. pis. xli., xlii. 



5. PETROGALE PENICILLATA, Gray, sp. (1827). 



Brush-tailed Rock-Wallaby. 



Size large; form stout and heavy. Fur long, thick, and coarse- 

 General color above dull brown, more rufous on the rump; below, 

 chin and chest pale gray, belly brown tinged with yellow ; anal 

 region rich yellowish-rufous. Whisker-mark and cheek-stripe ill- 

 defined. Occipital streak black, not extending on to neck. Ears 

 short, their insides and posterior margins yellow ; remainder gray 

 at base, black terminally. A black mark behind the shoulder, 

 succeeded by a pale gray one, both often inconspicuous. Arms 

 and legs brown or rufous-brown ; fingers and toes black. Tail 

 long, more or less bushy, the basal three or four inches rufous, 

 the rest black, the extreme tip sometimes yellow. 



Dimensions. Head and body about twenty -nine inches ; tail 

 about twenty-three inches. 



Habitat. Coastal Districts of Queensland, New South Wales, 

 and Victoria. 



References. Thomas, B. M. Catal. p. 66, pis. ix. fig. 7 (upper 

 front teeth), x. fig. 14 (fourth premolar); Gould, Mamm. Austr. 

 ii. pis. xxxix., xl. 



6. PETROGALE XANTHOPUS, Gray (1854). 



Yellow-footed Rock-Wallaby. 



Size large. Fur long, soft, and silky. General color above 

 gray, below white. White cheek stripe well defined ; a rich 

 orange spot above each eye. Ears long, uniform yellow behind. 

 A well defined black streak from the occiput to the middle of the 

 back. A triangular brown blotch behind the elbow, succeeded 

 by a white stripe running down to the hip : top of knee brown, 

 with a white patch outside it. Limbs uniform rich yellow ; tips 

 of fingers and toes brown. Tail above and on the sides with 

 alternate rings of dark brown and pale yellow, the brown gradu- 

 ally coalescing above posteriorly to form a blackish crest ; below 

 uniform yellowish- or brownish-white ; extreme tip sometimes 

 yellow. 



Dimensions. Head and body about thirty-two inches ; tail 

 about twenty-four inches. 



Habitat. South Australia. 



References. Thomas, B.M. Catal. p. 64, pi. xii. fig. 1 (upper 

 view of skull); Gould, Mamm. Austr. ii. pis. xliii., xliv. 



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