Chapter II: The White-Collared Mangabey. Cercocebus Collaris

_Mangabey à collier blanc_, Buffon, Hist. Nat., xiv., p. 256, pl. 33; F.
Cuvier, Mamm., livr. xxxv. (Dec., 1821)

_Cercocebus æthiops_, Geoffr., Ann. Mus., xix., p. 97 (1812), (nec _Simia
æthiops_, Linn.).

PLATE XXVII.

{39} _Cercopithecus æthiops_, Kuhl. Beitr. Zool., p. 97 (1820, nec _S.
æthiops_, Linn.).

_Cercopithecus æthiopicus_, F. Cuvier, Mamm., livr. xxxv. (Dec., 1821).

_Cercocebus collaris_, Gray, List Mamm. Brit. Mus., p. 7 (1843); id.,
Cat. Monkeys Brit. Mus., p. 27 (1870); Schl., Mus. Pays-Bas, p. 96
(1876.)

CHARACTERS.--Hair on the crown of the head not elongated, but directed backward; whiskers small, directed backward; no beard. Face, ears, hands, and callosities nude; tail long, carried over the back.

Face, ears, and hands black; the top of the head rich reddish-brown; whole of upper side of the body, hinder part of the shoulders, back, external surface of both pairs of limbs, feet, and tail, greyish slate-colour; throat, breast, whole under side of the body and inside of the limbs white, as are the nape of the neck, sides of the face, the fore part of the shoulder, and the front aspect of the arms, as far as the top of the fore-arm; in many species a somewhat broad wash of slate-grey crosses the side of the face from the cheeks to below the ear.

DISTRIBUTION.--West Coast of Africa.

III. THE WHITE-CROWNED MANGABEY. CERCOCEBUS ÆTHIOPS.

(_Plate XXVII._)

_Simia æthiops_, Linn., Syst. Nat., i., p. 39 (1766).

_Cercocebus æthiops_, Geoffr. Cat. Méth. Primates, p. 25 (1851); Gray,
List Mamm. Brit. Mus., p. 7; id., Cat. Monkeys Brit. Mus., p. 27 (1870);
Schl., Mus. Pays-Bas, vii., p. 95 (1876).

_Cercopithecus lunulatus_, Temm., Esquiss. Guin., p. 37 (1853).

CHARACTERS.--This species is very similar to _C. collaris_, but differs in being slightly darker above, and in having a spot on {40}the back of the head, as well as a narrow streak down the back greyish-white.

DISTRIBUTION.--West Africa.