40 LLOYDS NATURAL HISTORY. 



the back of the head, as well as a narrow streak down the back 

 greyish-white. 



Distribution. — West Africa. 



IV. THE GREY-CHEEKED MANGABEY. CERCOCEBUS ALBIGENA 



Presbytis albigena. Gray, P. Z. S, 1850, p. 77, pi. xvi; Murie, 



P. Z. S., 1865, p. 740. 

 Cercocebus albigena^ Pucher., Rev. Zool., 1857, p. 241 ; Schl., 



Mus. Pays-Bas , vii., p. 97 (1876). 

 Cercocebus {Se?nnocebus) albigena, Gray, Cat. Monkeys Brit. 

 Mus., p. 27 (1870). 



Characters. — Face nude, except for a few short hairs on the 

 cheeks and lips ; a tuft of long stiff hairs projecting over each 

 eye ; hair of the body elongated on the fore-quarter and arm ; 

 on the crown and nape the hair long and directed backwards, 

 forming a crest ; hands and feet short, tail long, thumb small, 

 and great-toe large and broad ; face black. 



General colour of the body black; cheeks, throat, a spot 

 behind the ear, sides of the neck, shoulder, and front of the 

 chest greyish ; hairs on the face and over the eyes black ; tail 

 black ; callosities black. 



A younger specimen, which died in 1865 in the Zoological 

 Gardens in London, had the throat, sides of the neck and front 

 of the chest, dirty-brown ; hairs of the cheeks of the same 

 colour, and some of them also black. 



Distribution. — West Africa. 



V. THE BLACK MANGABEY. CERCOCEBUS ATERRIMUS. 



Cenopithecus aterrimuSi Oudem. Zool. Gart., xxxi., p. 267 



(1890). 

 Cercocebus aterrtmus, Scl, P. Z. S., 1893, P- 256 (note). 



