9. PSETTDOCHIETTS. 179 



distinct tragoid projections on their inner surfaces, these projections 

 each covered with long shining black hairs ; back of ears covered 

 with short soft reddish fur. Back glistening coppery brown ; 

 grizzled with black, the hairs dark brownish grey basally, shining 

 orange terminally; centre of back with a distinct narrow black 

 mesial line estending from the nape to between the hips. Chin 

 greyish, chest and belly pure white along the middle line, grey mixed 

 laterally. Outsides of limbs like back, inner sides greyish. Tips 

 of fingers and toes black. Palm- and sole-pads large, rounded, finely 

 striated. Tail thick, tapering, the hairs woolly to the tip ; coloured 

 like the back, but duller in tone, gradually darkening to the end, 

 where there is no trace of a white tip. Naked part below 

 (PI. XVII. fig. 8) extending for nearly half the length of the taU, 

 sharply defined from the hairy part, about 5 milHm. in breadth all 

 along ; its surface, especially proximally, coarsely shagreened, but 

 smoother in less aged specimens. 



Slcull (PI. XX. fig. 1) remarkable for its great width across the 

 orbital region, and for its very short, narrow, and pointed muzzle. 

 Nasal notch shallow, rounded. Naso-premaxillary about equal to 

 naso-maxillary suture. Nasal bones narrow in front, much ex- 

 panded behind, their upper surface slightly convex anteriorly, 

 concave posteriorly. Interorbital region deeply concave in the 

 centre, its edges raised up into high prominent sharp-edged ridges, 

 projecting vertically from two to three miUim. above the level of 

 the concave part between them. Orbits very large and round, their 

 outer walls so much expanded as to make the greatest zygomatic 

 breadth of the skuU come opposite their centres. Anterior palatine 

 foramina short, extending backwards to the level of p.' Posterior 

 palate with a pair of small irregular vacuities. Bullae inflated, 

 decidedly larger than in Ps. archeri. 



Teeth (fig. cit.) stout and heavy, the upper series continuous, 

 not interrupted by marked diastemata. Upper i.' short, thick, 

 sharply pointed, its extreme tip slightly diverging from that of its 

 fellow. I.^ short vertically, very long and broad horizontally, the 

 cutting-edge of the lower i.' biting on to its top instead of between 

 it and its fellow ; its posterior edge projecting downwards (in the 

 natural position) much more than its anterior. I.^ small, cylindrical ; 

 canine and p.^ close to each other and to the other teeth, conical, 

 pointed, about equal in height. P.^ about one third the size in cross 

 section of the large and powerful p.* Lower i.' curved upwards at the 

 tip, and with a marked upward projection proximaUy which sharply 

 separates the enamel-covered cutting-portion from the root, and 

 causes the upper cutting-edge to be decidedly concave in outline. 

 Diastema between i.' and p.^ very short, the single minute tooth 

 (probably i.^) nearly filling it up. P.' longer and heavier than usual, 

 and with its anterior cusp more strongly developed. 



n2 



