224 PEBAMEtrdJi. 



belly pure white. Outer sides of fore and backs of hind limbs dark 

 grey, grizzled -with white. East of limbs white. Hands white, the 

 fingers sometimes partially brown. Palms naked, wrinkled, the 

 pads very indistinct. Hind feet white above. Soles thickly hairy, 

 except just at the heel and at the bases of and underneath the 

 fingers, black or dark brown for their posterior half, white distaUy, 

 but the latter colour replaced by black in very old specimens. 

 Tail about the length of the body without the head, thickly hairy 

 throughout, its basal third furred and coloured like the body, its 

 middle third black or dark brown, the hairs hispid and rather 

 longer above than below, its terminal third sharply contrasted pure 

 white, the hairs on the upper surface much elongated, and forming 

 a prominent white crest. 



Skull (PI. XXII. fig. 1) large and powerful. PremaxiUaries 

 each with a small spicule of bone directed forwards below and 

 parallel to the tip of the nasals; the tip of the muzzle being 

 therefore, when viewed from the side, trifid. Nasals long and 

 narrow, their greatest ^breadth going about 6 to 6| times in their 

 length. Interorbital region flat, markedly constricted, its edges 

 rounded. Laerymals forming sharp overhanging ridges externally, 

 separating sharply their orbital from their facial surfaces. Zygo- 

 mata stout and wide-spreading, markedly more so in the male than in 

 the female. Anterior palatine foramina extending to about halfway 

 between i.' and the canine. Palate with a single large vacuity 

 extending from about p.' to m.^, not divided by a bony septum 

 down the centre; extreme back, of palate with smaller irregular 

 vacuities. Walls of foramen rotundum tubular, prolonged forwards, 

 the opening just below instead of behind that of the combined 

 foramen lacerum anterius and foramen opticum. Bullae large, much 

 prolonged outwards, backwards, and downwards. 



Teeth large and strong. Upper incisors broad, flattened, i.^ about 

 half the size of the succeeding teeth, i.'', i.', and i.^, which are sub- 

 equal ; i.* slightly pointed, separated from i.* by a narrow diastema. 

 Canine long and strong, and becoming exceedingly large in old 

 specimens ; its distance from i.° about 4, and from p.^ about 3 or 4 

 millim. P.^ and p." narrow, unicuspid, the former very slightly 

 larger than the latter, but the difference scarcely appreciable; 

 p.* broader ■ transversely than the others, but distinctly shorter 

 both horizontally and vertically. Molars rounded in section, fitting 

 closely together, without V-shaped spaces between them ; their 

 crowns very long, and their roots only closing up quite late in life, 

 so that they present a decided approach to continuously growing 

 teeth; their ousps, when unworn, blunt and rounded. Lower 

 canine not or scarcely longer than the premolars. P.' slightly 

 longer horizontally than p.', and decidedly longer than p.* ; the 

 latter tooth inconspicuously broadened behind basaUy. Molars as 

 in the upper jaw. Milk-p.* above and below oval, equal in size, 

 nearly twice as long as broad, their shape and size in section very 

 similar to those of the lower i.° 



