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.
Cercopithecus aterrimus, Oudem. Zool. Gart., xxxi., p. 267 (1890).
Cercocebus aterrimus, Scl., P. Z. S., 1893, p. 256 (note).
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.
Cercocebus galeritus, Peters, M. B. Ak. Berl., 1879, p. 830, pls. i.B and iii. (Crania).