_Presbytis albigena_, Gray, P. Z. S., 1850, p. 77, pl. 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_ (_Semnocebus_) _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.