Proceedings of the General Meetings for Scientific Business of the Zoological Society of London 1893

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254 MR. P. L. SCLATER ON T H E [Mar. 14, 27. CERCOPITHECUS ERXLEBENI. Cercopithecus erxlebenii, Puch. Rev. etMag. de Zool. 1856, Dahlb. Zoolog. Stud. p. 109, t. v. (1856); Gray, P. Z. S. 1868. p. 182 ; id. Cat. Monk. B. M. p. 23 (part.); Sci. P. Z. S. 1871, p. 36 ; id. List Vert. (1883) p. 10. Hab. West Africa : Congo (Monteiro). W e received our first specimen of this beautiful species in 1870, since which date six others have arrived in the Society's Menagerie. It is possible, however, that some of these last may have been referable to two succeeding forms. But the three skins which I exhibit (received 5/9/82, 17/7/85, and 13/10/87) all belong to what I call true erxlebeni, which is without the black stripe on the lower back. 28. CERCOPITHECUS POGONIAS. Cercopithecus pogonias, Benn. P. Z. S. 1833, p. 67 ; Wagn. Siiug. Suppl. v. p. 43 (1855); Gray, P. Z. S. 1868, p. 182; id. Cat. Monk. B. M. p. 23 (1870). Hab. Fernando Po (Knapp, Thomson, Fraser). United by Sehlegel to C. erxlebeni, but apparently quite distinct, and at once known by the well-defined black dorsal stripe. Type and three other specimens in the British Museum. 29. CERCOPITHECUS NIGRIPES. Cercopithecus nigripes, Du Chaillu, Proc. Bost. N. H. Soc. p. 360 (1860) ; Gray, P. Z. S. 1868, p. 182. Cercopithecus pogonias, Schl. Mus. P.-B. Simice, p. 82. Hab. Gaboon (Bu Chaillu). Like C. pogonias but darker, and the black dorsal stripe much broader and less well defined (Mus. Brit.). Sect. F. Cercopitheci barbati. This section, the members of which are at once recognizable by the long beard on the chin, contains only the well-known Diana Monkey and the recently described C. brazzce, which may be dis­tinguished as follows :- ( Nose naked ; frontal crest black and white ... 30. diana. \ Nose hairy ; frontal crest red 31. brazzcu. 30. CERCOPITHECUS DIANA.. Simia diana, Linn. Syst. Nat. i. p. 38 (1766). Cercopithecus diana, Erxleb. Syst. Regn. An. p. 30 (1777); Martin, M. An. p. 523 ; Geoffr. Diet. univ. d'Hist. nat. iii. p. 304 ; Wagn. Saug. Suppl. v. p. 48 (1855) ; Gray, P. Z. S. 1868, p. 182; id. Cat. Monk. B. M. p. 22 (1870); Sci. List Vert. (1883) p. 10; Schleg. Mus. P.-B. vii. p. 92 (1876); Jentink, Notes L. M. x. p. 12 (Liberia). Hab. Delta of Niger (Fraser); Gold Coast (Pel); Niger (Fraser); Liberia (Bultikofer).