Tloo new North-Bornean Mammals. 231 



colours are, however, not pure, tlie 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. Thomasi. Chin, sides of neck, throat, and 

 chest greyish, owing to a mixture of black with the white 

 hairs; these parts are ])ure white in all the allied species and 

 contrast with the dark colour of the na))e and crown. Belly 

 and inner sides of the upper arms and of the legs to the ankles 

 Avhite, 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 iaw 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. Hosei and 8. Everetti. The 

 ascending processes of the maxillary bones are broad and 

 strong, and pass up beyond the nasals to articulate with the 

 iVontals, 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 species. Fifth cusp to mT^ small or absent, i. 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. 93. 3. 

 4. 2) :— 



Head and body (c.) GOO millim., tail 7G0. 



Skull: extreme length 95, basal length G5"5; greatest 

 breadth 73*G ; intcroibital breadth 8 ; intertemporal constric- 

 tion 4G*7 ; brain-case, breadth 61, height (basilar suture to 

 bregma) 46 ; palate, length 32*5 ; nasal opening, height 16*4, 

 breadth ]0'7 ; lengtli of upper premolar and molar series 24"G. 



llah. Tailan, N. Borneo. (Joll. A. Everett, July 1892. 



