2. PETEOGAIE. (j9 



Teeth (PI. IX. fig. 8, and PI. X. fig. 15) comparatively small and 

 delicate ; their proportion as usual. 



Bimensions. 



6. ?. 



b (skin). (stuffed), 

 millim. millim. 



Head and body (c.) 590 600 



TaU 460 420 



Hind foot 139 120 



Ear 48 49 



Skull, see p. 72. 



Hab. Western Australia. 

 Types in collection. 



j Ad. sk. I , N.W. coast of Australia. B. Bynoe, Esq. [P. 

 "■ Skull, f ^- &0.]. 



, I Ad. sks. I , p Swan R., W. A. (J". Gilbert). Gould Ooll. {Co- 

 ' "■ I Skulls, j o + • types of species.) 



d. Skull. Swan K., W. A. (/. CfUbert). Gould CoU. 



e. SkuU. Gould Coll. 



4. Petrogale brachyotis. 



Macropus (Petrogale) brachyotis, Oould, P. Z. S. 1840, p. 129 ; Less. 



N. Tabl. R. A., Mamm. p. 194 (1842). 

 Petrogale bracliyotis, Oould, Mon. Macrop. pi. vi. (animal) (1841) ; 



Ch'ay, Grey's Austr., App. ii. p. 403 (1841) ; Gray, Idst Mamm. 



B. M. p. 92 (1843) ; Gould, Mamm. Austr. ii. pi. xlvii. (animal) 



(1859); Geirard, Cat. Bones Mamm. B. M. p. 128 (1862); 



Krefft, Azistr. Vert. p. 11 (1871). 

 Macropus brachyotis, Waterh. Jard. Nat. lAhr,, Mamm. xi. p. 247 



(1841) ; Gieb. Siiug. p. 684 (1859). 

 Halmaturus brachyotis, Schinz, Syn. Mamm. i. p. 562 (1844) ; Wagn. 



Schr. Siiug. Supp. v. p. 330 (1865). 

 Macropus (Heteropus) brachyotis, Waterh. iV. H. Mamm. i. p. 176 



(1846). 



Shokt-baeed Kock-Wallabt. 



Size small, form light and slender. Fur short and thin ; under- 

 fur sparse, dark slaty grey. General colour greyish fawn. Head 

 pale grey ; face-markings almost obsolete. Ears very short, their 

 backs uniform fawn-grey like the head, their edges and extreme 

 tips white. Body-markings present, but not prominent; a dark 

 brown blotch behind .the elbow, succeeded by a whitish band. Chin, 

 chest, and belly greyish white. Limbs pale grey. Tail grey above, 

 whitish below for three-fourths of its length, the terminal fourth 

 tufted with longer dark brown hairs. 



SkuU (PL XII. fig. 2) about the same size as that of P. lateralis, 

 but more heavily built. Muzzle broad, conical. Nasals narrow in 

 front, much expanded behind, their posterior edge projecting back- 

 wards in the centre only. Interorbital region flat or very slightly 



