Two new North-Bornean Mammals. 251 
colours are, however, not pure, the black crest being largely 
mixed with white hairs, and the pale frontal patches with 
black ones. Occipital hairs directed backwards, not reversed 
forwards as in S. Thomas?. Chin, sides of neck, throat, and 
chest greyish, owing to a mixture of black with the white 
hairs; these parts are pure white in all the allied species and 
contrast with the dark colour of the nape and crown. Belly 
and inner sides of the upper arms and of the legs to the ankles 
white, becoming gradually greyer distally. Hands and feet 
shining black, but the forearms to the wrists and the legs to 
the ankles are clear grizzled grey, as is also the tail both 
above and below. 
Skin of face white (presumably flesh-coloured in life) all 
across and between the orbits and round the cheeks, so that 
‘it is only black just over the maxillary and premaxillary 
bones and on the chin. In the other species the skin is 
nearly or quite black all over the face. 
Skull, as usual in this genus, showing but few tangible 
characters. It appears, however, to have a decidedly broader 
and rounder brain-case than in the allied species; it is 
slightly less prognathous, and in the lateral view the con- 
cavity at the anterior nares is deeper and more abrupt, while 
above them the tips of the nasal bones stand out much more 
prominently, at least than in S. Hoset and S. Hveretti. The 
ascending processes of the maxillary bones are broad and 
strong, and pass up beyond the nasals to articulate with the 
frontals, and entirely shut out the maxillary bones from the 
sides of the nasals; in this character conditions quite different 
seem to obtain in the allied species, although there is 
undoubtedly a good deal of individual variation in the relative 
extent of the facial bones. In the dentition the canines both 
above and below are considerably smaller and slenderer than 
in the other specjes. Fifth cusp to ng small or absent, 7. e. 
small in the type and absent in the second specimen, the two 
thus showing how variable this character, often supposed to 
be of generic value, may be. 
Dimensions of the type, an adult male skin (B.M. 98. 3. 
4, 2) :— 
Head and body (c.) 600 millim., tail 760. 
Skull: extreme length 95, basal length 65°5; greatest 
breadth 73°6 ; interorbital breadth 8; intertemporal constric- 
tion 46°7 ; brain-case, breadth 61, height (basilar suture to 
bregma) 46; palate, length 32°5 ; nasal opening, height 16°4, 
breadth 10°73 length of upper premolar and molar series 24°6. 
Hab. Paitan, N. Borneo. Coll. A. Everett, July 1892. 
