174 



PHALANQEEIDJE. 



but they appear to be constant, at least in fuUy adult specimens, 

 and intermediate individuals are the less likely to occur, as the 

 three species are sharply separated geographically, Ps. occidentalis 

 being as absolutely isolated by the (to a Phalanger) impassable 

 treeless desert north of the Grreat Australian Bight as Ps. cooki. is 

 by Bass's Straits. 



The South Victorian specimen r does not, so far as its skull is 

 concerned, show any approximation to the Tasmanian species, a fact 

 that tends to prove the essential distinctness of the two forms. 



j Ad. sk. I 

 "■• 1 Skull. 1 



<S- 



b. 



I Imm. sk. I o 

 ) Skull. f +• 

 lAd. sk. I 



"■ I Skull, f 



d-e. Yg. St. 



?■ 



f,g. Ad. St., d?. 

 A^'. Ad. St., 2 ■ 



*■ ]Skull. ( °- 



I. 



i Ad. sk. i Q 



il. /^ 



I Skull. . 



I Ad. sks. I , o 



lAd.sk. I o 

 "• i Skull. [ ?• 



1 Ad. sk. / 

 P- ) Skull, f 



JAd.sk. I 

 ^- J Skull. I 



I Ad. sk. , 

 '■• jSkuU. f ^■ 

 s. Imm. al., J . 



Flats, Upper Hunter R., 



N. S. W. {J. <?.). 



{Type of P. 

 North of Hunter R., N. 8, 



W. (/. G.\ 

 Upper Hunter R., N. S. W. 



{J. O.). 

 Upper Hunter R., N. S. W. 



(J. G.). 

 Yarrundi, N. S. W. {J. G.). 

 Liverpool Range, N. S. W. 



{J. G.). 

 Liverpool Range, N. S. W. 



{J. G.). 

 Clarence R., N. S. W. (J. 



G.). 

 New South Wales {J. G.). 



New South Wales. 



Australian Alps, 



N.E. Victoria. 

 Australian Alps. 



Gould Coll. 



Inosa, Gould.) 

 Zool. Soc. 



Gould Coll. 



Gould Coll. 



Gould CoU. 

 Gould Coll. 



Gould Coll. 



Gould Coll. 



Gould Coll. 



Zool. Soc. 



Dr. Lhotsky 



[P.]. 

 Purchased. 



Western Port, Victoria. Purchased. 



Mr. J. Beazley 



[C.]. 



4. Fsendochirus occidentalis. 



Westbbn Ring-tailed Phalangek. 



General colour deep smoky grey, very variable in tone, but with- 

 out any tinge of rufous. Ears thinly hairy, the white spot on the 

 posterior border of their backs scarcely occupying one third of the 

 whole posterior margin. Sides not more rufous than back, smoky 

 grey. Chin, chest, and beUy white, the bases of some or most of 

 the hairs grey. Limbs like back ; hands and feet dark reddish 

 brown or black, usually markedly darker than the rest of the 

 limbs. TaU short-haired and white for a longer distance than in 



* Partially melanistio. Ears without white patches. 



