CHARACTERS.--Top of head, back, sides of face, outside of thighs, and root of tail pale fulvous, densely ringed with black; a frontal band, of dense erect hairs, chestnut, {82}white-tipped, bordered behind by a broad black band from ear to ear; ears nearly naked; upper part of nose and a narrow line above the eyes, in front of the chestnut band, black; lower nose and upper lip white; a longish white beard on the chin and throat; belly dark fulvous, the hairs densely ringed with black; hands and feet black; inner side of thighs, arms, and a streak along the posterior aspect of the thighs, white; tail, except at its base, black. Length, 21 inches; tail, 22 inches. (_Sclater._) Nearly related to _C. neglectus_. DISTRIBUTION.--West Africa: Upper Congo. VII. CERCOPITHECI TRITUBERCULATI. This section of the Family contains but one species, distinguished by the posterior lower molars having only three, instead of four, tubercles to their crowns. On this account it has been considered by some systematists to be the type of a distinct genus, _Miopithecus_. XL. THE TALAPOIN. CERCOPITHECUS TALAPOIN. (_Plate XXXII._) _Talapoin_, Buff., Hist. Nat., xiv., p. 287, pl. xl. (1766). _Cercopithecus talapoin_, Erxleb., Syst. Régn. Anim., p. 36, no. 15 (1777), Geoffr., Ann. Mus., xix., p. 93 (1812); Desm., Mamm., p. 56; Martin, Mammif. Anim., p. 534 (1841); Schl., Mus. Pays-Bas, vii., p. 71 (1876). _Simia talapoin_, Gm., Syst. Nat., i., p. 101 (1788); Schreber, Säugeth., i., p. 101, no. 18, pl. 17; Fischer, Synops. Mamm., p. 21 (1829). _Cercopithecus pileatus_, Desm., Mamm., p. 57 (1820; nec Shaw). _Miopithecus talapoin_, Geoffr., Dict. Nat. Hist., iii., p. 308 (1849); Gray, Cat. Monkeys Brit. Mus., p. 20 (1870). PLATE XXXII. [Illustration: THE TALAPOIN.] {83}_Miopithecus capillatus_, Geoffr., C. R., xv., p. 720 (1842.) _Simia melarhinus_, Schinz, Synop. Mamm., i., p. 47 (1844). CHARACTERS.--Small in size; head globular; muzzle very short; eyes large; ears very expanded; nose but slightly protruding, with oblong nostrils opening laterally, the septum thick; hands short, fingers united by a web. Skull large; superciliary ridges and orbits also large; posterior molar in both jaws small; those in the lower jaw only three-cusped (two cusps in front, one behind); anterior and median lower molars four-cusped. Naked skin round the eyes orange; upper lip yellow; whiskers directed downward, bright straw-yellow; upper eyelids white; nose black; ears naked, black; frontal hairs erect, forming a distinct curved crest. Fur speckled olive-green--the hairs grey at the roots, olive-green in the middle and black-tipped; fur darker on the body, paler and more washed with yellow on the outer side of the body and upper side of the hands and feet. Under surface of the body and the inside of the limbs white; tail ashy-grey. Length of body, 13½ inches. DISTRIBUTION.--West Africa: Gaboon.