1. MA0ROPU8. 61 



pis. xxxvii., xxxviii. (animal) (1856) ; Jent. Cat. Ost. Leyd. Mus. 



p. 320 (1887). 

 Macropus (Setonyx) brachyurus, Less. N. Tabl. R. A., Mamm. p. 194 



(1842) ; Chmu, Eneycl. d^H. N., Mars. p. 346 (1879). 

 Macropus (Halmaturus) bracliyurua, Waterh. N. S. Mamm. i. p. 162, 



pi. T. figs. 16 & 16 a (skull and teeth) (1846). 



Shokt-tailbd Wallaby. 



Size small ; form short and squat. Ehinarium with a central 

 upward projection, as in M. coxeni. Pur long and thick, but coarse, 

 at least in adult specimens. Underfur long and soft, dark slaty 

 grey. General colour uniform, coarsely grizzled grey-brown, with 

 a tinge of rufous in some specimens. Face grizzled grey, without 

 definite markings ; sides of cheeks pale grey or rufous. Ears very 

 short and rounded, projecting but little from the long fur of the top 

 of the head ; their backs thickly haired, grizzled-grey. Back 

 coarsely grizzled with grey and black ; no body-markings at all. 

 Chin, chest, and belly slaty grey. Arms and legs like body, hands 

 and feet brown. Tail very short, only about twice the length of 

 the head ; brown above, greyish white beneath. 



Skull (PI. VII. fig. 4) much smaller than those of other members 

 of the group, strongly built and broad in proportion to its length. 

 Muzzle short, stout, and conical. Premaxilte upright, the naso- 

 premaxillary suture about equalling the naso-maxillary. Nasals 

 short, very little broader behind than in front, their contraction 

 forwards gradual and even, and their posterior suture much bowed 

 backwards in the centre. Supraorbital edges forming in old 

 specimens distinct postorbital processes-, behind which, there is a 

 strongly marked intertemporal contraction. Zygomata remarkably 

 broad and strong. Palatal foramina very short. Coronoid process 

 of lower jaw unusually broad and powerful. 



Teeth very differently proportioned to those of any other member 

 of the genus. Incisors (PI. IX. flg. 6) small and light ; i.' very 

 small, its edge shorter than that of either i.' or m.\ its notch about 

 its centre instead of at the back. P." (PI. X. flg. 13) oblong, 

 enormously broad and powerful, as broad in front as behind, with 

 a well-marked internal ledge, and with three or four external 

 vertical grooves. Molars very similar to those of Dorcopsis, small 

 and light, with nearly or quite obsolete central conneoting-ridges. 



Dimensions. 



a (skin). 



millim. 



Head and body (c.) 580 



Tail 250 



Hind foot 105 



Ear ,.. 42 



SkuU, see p. 63. 



Hab. Western Australia. 



