_Cercocebus galeritus_, Peters, M. B. Ak. Berl., 1879, p. 830, pls. i.B
and iii. (Crania).
CHARACTERS.--A flat crest of blackish-brown hair radiating from 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.