2. PETEOOAtE. 67 



(?) Petrogale aasimilis ', Rams. P. Linn. Soc. N. S. W. i. p. 3G0 



(1876). 

 Macropus (Heteropus) aasimilis, Rami. P. Linn. Soc. JV. S. W. ii. 



p. 11 (1877). 



Betjsh-tailed Eock-WauabY. 



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

 General colour not unlike that of Macropus ualabatus, 'viz. dull 

 brown, more rufous on rump. Face dark grey-brown, ill-defined 

 dark whisker-mark and light cheek-stripe. Crown grey, a narrow 

 black line running along its centre from just behind the level of the 

 eye to the occiput, not extending down the neck. Ears short, their 

 insideg and their posterior edges outside yellow ; rest of their 

 backs grey at base, black terminally. Back dull grey-brown, the 

 hairs tipped with white on the forequarters, gradually becoming 

 deep rufous on the rump and base of tail. A black mark behind 

 the shoulder succeeded by a pale grey one, but both often hardly 

 visible. Chin and chest pale grey. Belly brown tinged with 

 yellow ; anal region rich yellowish rufous. Arms and legs brown 

 or rufous-brown ; fingers and toes black. Tail long, more or less 

 bushy, pencOled at tip, its basal three or four inches rufous like the 

 back, the remainder deep black ; extreme tip sometimes yellow. 



Shull long, more lightly buUt than in P. xanthqpus, the muzzle 

 long and slender. No inflation on sides of muzzle or on forehead. 

 Nasals very long, narrow, and little expanded behind, their greatest 

 width only about once and a half their least, and barely one quarter 

 of their length. Interorbital region markedly concave ; supraorbital 

 edges prominent, raised and overhanging, not converging backwards 

 so much as in P. xanihopus. Palatal foramina short, not penetra- 

 ting into maxiUa. Bullae opaque, rough and unswoUen. 



Teeth (PI. IX. fig. 7 and PI. X. fig. 14) as usual ; i.^ rather longer 

 and more Jkfacrqpw-like than in the other species. 



Dimensions. 



6. ^. 



a (stuffed). b (sMn). 

 millim. millim. 



Head and body 720 720 



Tail 560 560 



Hind foot 164 164 



Ear 48 51 



Skull, see p. 72. 



Hah. Eastern Coast districts, from Queensland to Victoria (Port 

 Essington ?) 



Type not in existence. 



* This species is stated to be smaller, to have less bristly feet, and less pro- 

 minent side-stripe than in P. penicillata ; but these points do not seem to be 

 sufficiently well marked to justify its retention as a separate species, especially 

 as the type was a female, and may easily have been not fully adult. 



r2 



