11. POIOEOTJS. 121 



Skull shorter and broader than in P. tridactylus. Muzzle very 

 markedly inflated along the sides from the anterior nares to the 

 front of the orbit, its breadth at the middle of the premaxillo- 

 maxillary suture equal to, or greater than, the length of the molar 

 series. Posterior nasal region also inflated vertically so as to make 

 the general fronto-nasal outline distinctly and evenly convex. 

 Nasals expanded behind, their greatest breadth going about 2^ 

 times into their length. Interorbital space smooth and rounded. 

 Palatal foramina and vacuities as in P. tridactylus ; bullae 

 apparently rather more swoUen than in that species. 



Teeth as in P. tridactylus, except that p.* is shorter, about 5f or 

 6 millim. long, and has only two or three grooves. 



Dimensions. 



2- 



a (akin), 

 milliia. 



Head and body 390 



.Tail 170 



Hind foot 68 



Muzzle to eye 48 



Ear 26 



SkuU, see p. 125. 



Hob. West Australia (southern district). 

 Type in collection. 



( Ad. sk. 1 o King George's Sound, W. A. Gould OoU. 



I SkuU. I +• ■ (J.Gilbert). _ __ i( Type of species.) 



J Imm. St. I o King George's T " ' ' « — ~ - 

 ) Skull. j +• {J. Gilbert). 



] Imm. St. I p King George's Sound, W. A. Gould CoU, 



3. Potorons platyops. 



ITypsiprymnus platyops, Gould, P. Z. S. 1844, p. 103; id. Mamm. 

 Austr. ii. pi. Ixx. (animal) (1851) ; Wagn. Schr. Sdug. Supp. v. 

 p. 299 (1855) ; Gieb. Saug. p. 690 (1859) ; Gerrard, Cat. Banes 

 Mamm. B. M. p. 130 (1862) ; Kre;fft, Mamm. Austr. text to pi. xi. 

 p. 5 (1871) ; Garrod, P. Z. 8. 1875, p. 58. 

 Hjpsiprymnus (Potorous) platyops, Waterh. N. H. Mamm. i. p. 231 

 (1846). 

 Beoad-paced Eat-Kancjaeoo. 



Size very small. Ehinarium naked, but not, or scarcely, extending 

 backwards in the centre above. Face very short and broad, con- 

 trasting markedly with that of the other species. Length and 

 quality of fur and colour everywhere as in P. tridactylus, except 

 that the tail is more or less bicolor, black above and dirty white 

 below. Hind feet very short, the hairs on them long, and partially 

 hiding the claws. 



Shull (PI. XIII. fig. 13) short and broad, but the bones thin and 



