CERCOCEBUS 267 



Geogr. Distr. Basin of the Congo, Calinda, mouth of the Congo, 

 (Monteiro) ; Caio, Luchenye River, north of the Congo, (Sclater) ; 

 "Stanley Falls"; Victoria Nyanza, (Delme-Radcliffe). 



Genl. Char. Crest on head short, occipital ; superciliary fringe 

 present ; whiskers grayish ; eyelids dark ; tufts over eyes ; hair very 

 long on neck and shoulders forming a mane ; erect tuft on back of head. 



Color. Head, body above, limbs and tail black ; throat and cheeks 

 pale gray ; sides of neck and chest sooty grayish ; hands and feet black. 

 Ex type British Museum. 



The type is a young animal ; it is difficult to say how youthful, as 

 the skull, unfortunately, could not be found. The hair on forehead is 

 erect on each side like horns, far above the rest on the head and is long 

 on the occiput. A similar arrangement of the hair is seen in a speci- 

 men from Tanganyika labelled aterrimus, and which is probably the 

 young of C. a. johnstoni, two adults of which are in the British 

 Museum. In the Paris Museum are three examples of the present 

 species, one of which is fully adult. It has the arms above elbows and 

 outer side of thighs gray ; the forearms and outer edge of thighs 

 black. Another has the outer side of limbs, shoulders, sides and back 

 of neck reddish. Length, 1,250; tail, 647.7; foot, 171.4. 



Cercocebus albigena johnstoni Lydekker. 



Semnocebus albigena johnstoni Lydekk., Novit. Zool., 1900. p. 

 596; Sclat., Proc. Zool. Soc. Lond., 1894, p. 595: Pocock, 

 Ann. Mag. Nat. Hist., XVIII, 7th Ser., 1906, p. 284 ; Schwarz, 

 Ann. Mag. Nat. Hist., 1910, 8th Ser., p. 529. 



Cercocebus jamrachi Pocock, Ann. Mag. Nat. Hist., 1906, 7th 

 Ser., p. 454. 



JOHNSTON'S MANGABEY. 



Type locality. Country of Barundi, north end of Lake Tangan- 

 yika, German East Africa. Type in British Museum, juv. 



Geogr. Distr. Central Africa, Uganda to West Africa, (Du 

 Chaillu) ; Uganda and Lake Mweru to Upper Congo, (Schwarz) ; 

 Lake Tanganyika, German East Africa. 



Genl. Char. Head crested as in C. albigena ; tuft of long erect 

 hairs over each eye; superciliary fringe shorter; entire upper parts 

 except neck and shoulders uniformly black. Eyelids dark. 



Color. Adult. Long hairs over shoulders and upper part of back 

 forming a short mantle, Prout's brown with a purplish tinge; top 

 of head, upper parts of body, limbs, hands, feet and tail black ; under 

 parts dark purplish brown. 



