DESCRIPTIONS OF TWO NEW PIIALANGER / 



-2. Phalanger leucippus, sp. n. — A Cuscus with abnormally 

 large premolars. The male grey as in females of other species. 



Size rather smaller than in Ph. orientali». Colour dark wavy 

 cinereous grey, many of the hairs with silvery subterminal bands. 

 Black dorsal line distinct. Limbs, belly and furry part of tail 

 greyish brown, little different from the back ; throat and chest 

 sharply defined yellowish white, without glandular suffusion. 

 Outer side of ears only partially haired, their terminal third 

 practically naked. Base of tail furry for about one third of its 

 length above. 



Skull, although that of a fully adult male, very like that of 

 the female of Ph. orientalis, so far as the interorbital region 

 and its ridges are concerned. Nasals not so broad as in Ph. 

 gymnotis. Supraorbital edges parallel, not heavily ridged, scarcely 

 overhanging. Canines short and delicate, not so long as the 

 large premolars , touching the last incisors at their base but 

 slanting back away from them terminally, just as in Ph. ornatus. 

 Anterior and middle premolars of normal proportions. Posterior 

 premolars disproportionally large, and angularly twisted out- 

 wards, so much so as to be visible beyond the general outline 

 when the skull is viewed from above ; their surfaces distinctly 

 grooved, and their edges notched. In the lower jaw the excessive 

 size and the outward twisting of these teeth are especially well 

 marked; their horizontal diameter exceeds the length of any of 

 the molars. Molars rather small in proportion. 



Dimensions of an old male, measured in skin : 



Head and body 480 mm.; tail 340; its furry part 1:20. 



Skull, basal length 79, greatest breadth 55 ; nasals 352 x 14; 

 breadth of constriction 10; diagonal horizontal diameter of last 

 upper premolar 6.1, of last low-er premolar 6.3; combined length 

 of i,(s ] ~ 3 15.5. 



Hah. Upper Vanapa River, British New Guinea. Coll. Dr. 

 L. Loria. 



This species seems to be most nearly allied to the Aru Island 

 Ph. gymnotis, Pot. and Doi 1 ., the typical skull of which has been 

 kindly lent me for comparison by Dr. Gestro. As was pointed 



