442 



ME, P. L. SCLATER ON THE 



[May 2, 



referred to the same group, but is easily distinguished from it by 

 several characters. In the first place the pure white nose and 

 upper lips, which are very noticeable in the male specimen last 

 received (see figure), separate it at once from C. albogularis, in 

 which, as will be seen by the skin now exhibited, there is no 



Cercopithecus boutourltnii, from a photograph of the stuffed specimen 

 received in 1889. 



trace whatever of this colour. This feature is so prominent 

 that it would almost justify the removal of the species to the 

 "Spot-nosed" group of my arrangement (see above p. 244), But 

 in most respects C. houtourlinii agrees better with C. albogularis 

 and the other species of my section D, Melat^ochim, 



Another point in which C. houtourlinii differs from C. albogu- 

 laris is the black belly and much blacker limbs. In C. albogularis 

 the belly is pale grey, and the external surface of the limbs is of a 

 dark grey, more or less annellated. Again, C. albogularis is a short- 



