Colobus leucomeros, Ogilby, P. Z. S., 1837, p. 69; Martin, Mammif. Anim., p. 497 (1841).
Colobus ursinus, Temm., Esquiss. Zool. Guin., p. 21 (1853).
Colobus vellerosus, Is. Geoffr., Dict. H. N., iv., p. 116 (1849); id., Cat. Méth. Primates, p. 17 (1851); Gervais, H. N. Mamm., i., p. 65 (1854); Sclater, P. Z. S., 1860, p. 246; Reichenb., Naturg. Affen, p. 87 (1862); Matschie, S.B. Ges. Natur. Fr. Berlin, 1892, p. 226.
Colobus bicolor, Gray, P. Z. S., 1868, p. 181; id., Cat. Monkeys Brit. Mus., p. 18 (1870); Schlegel, Mus. Pays-Bas, vii., p. 26 (1876); Rochebr., Faun. Sénég., Mamm., p. 24 (1885).
Guereza vellerosus, Truess. Consp. Mamm., p. 10 (1879).
Pterycolobus vellerosus, Rochebr., op. cit., Suppl. Mamm., p. 125, pl. x. (1887).
Characters.—Hair on the back, flanks, and loins, very long and silky; the fur everywhere deep black, excepting a frontal band, which coalesces with the long hair of the auricular region and sides of the neck, which are white, as well as the chin, the throat, a spot on each side of the buttocks, the external and posterior aspects of the thighs, and the short-haired tail, which is tufted at the tip; the thumbs very short, but distinct, and having a flat nail. Length of body, 28½ inches; of tail, 31 inches.
The young are similar in coloration to the adults, but the hair is not elongated.
Distribution.—West Africa: from the Gold Coast to Senegambia, where it is not uncommon.
VIII. THE ANGOLAN GUEREZA. COLOBUS ANGOLENSIS.