THE GUENONS. 4 1 



Characters. — Closely allied to C. albigena, but distinguished 

 by its generally deep black colour, except on the shoulders and 

 nape, which are blackish-brown or brownish-grey— the hair 

 here being no longer than on the rest of the body ; hairs on 

 the cheeks, fine, velvety, and whitish ; whiskers thick, greyish- 

 brown ; beard very sparse, whitish. 



Distribution. — South-west Africa : Stanley Falls on the Congo. 



Habits. — Unknown. 



VI. THE CRESTED MANGABEY. CERCOCEBUS GALERITUS. 



Cercocehus galeritus, Peters, M. B. Ak. Berl, 1879, p. 830, pis. 

 i.B and iii. (Crania). 



Characters. — A fl.it crest of blackish-brown hair radiating 

 fi om the top of the head all round and over the forehead ; the 

 entire upper surface covered with long loose fur, the hairs grey 

 at their base, and higher up ringed with greyish-green and 

 blackish-brown ; the fore-arms, hands, feet, and the basal 

 three-fourths of the tail blackish-brown ; the sides of the head 

 and the whole under surface yellowish ; the inside of the limbs 

 yellowish-grey ; the hair of the terminal part of the tail lighter 

 than the rest, and ringed with yellow ; face, bluish-black. 



Distribution. — E. Africa ; Mitola, at the mouth of the Osi and 

 Tana rivers. 



Habits — This species was found living in the woods on the 

 coast in small troops of from five to six in number. 



THE GUENONS. GENUS CERCOPITHECUS. 

 Cercopithecus, Erxleben, Syst. Regn. Anim., p. 22 (1777). 



The genus Cercopithecus includes a larger number of species 

 than any other of the Anthropoidea. Its members are charac- 



