— 124 — 



Cf ad. 9 ad. 



Bieadth (if brain case 58.7 » 55 » 



» acroRs iniddle of orhit?; . . 55 ^> 53.5 » 



Least postorbital width 44.5 » 41.5 » 



» interorbital widtli 5 » 5 '^ 



Leugth ûf palate with spine (') (^) . 35.5 » 35.5 » 



» of upper molars séries . . 23.7 » 22 » 



» of uj^per triie molars ... t6 » 15.4 » 



As usually is the case among monkeys the dimensions of the 

 skull vary. Another adult maie skull has f. i. a greatest length of 

 94 mm., and the length of its upper molar séries is onlv 20.2 mm. 

 The shape of the orbits is also variable, as I hâve proved to be the 

 case in Cercopithecii.^ schmidti enkamc . 



Cercopithecus ascanias cirrhorhinus Matschie. 



Tshoppo, n"' 246, 248, 249, 347, 350, 353, 354, 357, 358. 



In the Congo Muséum I hâve had the opportunity of seeing 

 tvpe and cotypes of this race, the type of which is said to hâve 

 come from the « province of Stanley Falls ». It has as a rule the 

 nasal spot paler and more « honey yellow » (Oberthur 35.1) than 

 is the case in C. a. kassaicus. Otherwise both are verv similar and 

 the lower side of the latter is certainly often fully as pure white 

 as in cirrhorhinus. Both differ from Whitesidei Thomas by the 

 practical absence of a black brow-band. As C. a. Whitesidei is said 

 to be from Lulonga, it is possible that it has its distribution north 

 of C. a. kassaicus and to the west of the région inhabited by 

 C. a. cirr/iorhitms. For this interprétation speaks also the fact that 

 a mounted spécimen (n° 310) from the « district de l'Equateur » 

 has a well developed black brow-band and might be referable to 

 Whitesidei, although its nasal spot is almost white. 



C) Without, 32,5 mm. 

 ( 2) Wilhoul, 30 mm. 



