203 PHALANGEEID^. 



Jent. Notes Leyd. Mus. vii. p. 93 (1885) ; Thos. Encycl. Brit. (9) 



xviii. p. 728, fig. 1 (skull) (1885) ; Jent. Cat. Ost. Leyd. Mus. 



p. 307; pi. xi. figs. 1, 2, & 4 (skull, difierent ages) (1887)._ 

 Phalangista (discus) orientalis, Waterh. N. H. Mamm. i. p. 279 



(1846) ; Pet&rs ^ Doria, Ann. Mus. Oenov. xvi. p. 681 (1881). 

 Phalangista (Cuscus) gymnotis, Peters (^ Doria, Ann. Mus. Genov. 



■vii. p. 543 (1875) ; iid. op. cit. xvi. p. 679, pi. viii. fig. 3, pi. ix. 



fig. 3 (skull), & pi. xiv. (animal) (1881). 

 Cuscus vestitus, M.-Edw. C. R. Ixxxv. p. 1080 (1877). 



Grbt CtrscTJS. 



Size rather less than in the last species; females smaller than 

 males. Fur soft and woolly, extremely variable in length. 

 General colour grey, but varying from nearly white to dark greyish 

 brown ; pure white, albino, individuals proportionally numerous, 

 but nearly invariably males. Upper surface quite uniform in tint, 

 the head, outer sides of limbs, back, and base of tail all of the same 

 colour, which is, as a rule, markedly paler in males than in females. 

 Muzzle naked along the upper surface for about half the distance 

 towards the eyes. Ears (PI. XXI. fiig. 3) small, rounded, naked 

 inside and along their margins, furry, like the rest of the head, 

 over the greater portion of their backs. Chin, chest, and' belly 

 ordinarily pale grey or white, the line of separation from the 

 darker colour of the flanks variable in distinctness ; throat and 

 neck, however, in many individuals, generally males, strongly 

 suffused with yellow or rufous*. Tail hairy for about its basal 

 half above and quarter below, but the extent of the hairy portion 

 very variable. 



ShuU stout and strong, with marked ridges and crests, which are, 

 however, much more developed in males than in females. Nasals 

 short, not projecting forwards nearly to the level of the anterior 

 point of the premaxillse, and only extending some two or three 

 millimetres in front of their junction with the ascending processes of 

 the premaxillse ; the nasal notch therefore very shallow (see PI. XX. 

 fig. 5). Interorbital region more or less concave, not or very 

 slightly inflated ; its edges strongly ridged, the ridges forming, in 

 old males, marked supraorbital ledges. Temporal ridges uniting in 

 old age, and forming a prominent central crest, highest over the 

 middle of the brain-case, but usually low and undeveloped at the 

 point where the two ridges first meet, so that there is at this point 

 a marked concavity in the general upper outline of the skuU. 

 Anterior palatine foramina reaching to between the canine and p.^ 



Teeth. Upper i.^ but little longer thau the others ; i.^, in section, 

 larger than i.'; i.^ very slender, crushed in between i.'' and the 

 canine, which it touches throughout its length (PI. XX. fig. 5). 

 Canine long, strong and pointed, situated on the premaxillo- 

 maxillary suture. P.' single-rooted, about halfway between the 

 canine and p.' ; p.' minute, absent on one or both sides in about one 



* This colour is probably only assumed during the rutting-seaaon. 



