78 Lloyd's natural history. 



xxxiv. the bearded guenon. cercopithecus pogonias. 



Cercopithems pogonias, Bennett, P. Z. S., 1833, p. 67 ; Wagner 

 in Schreber Saugeth. Suppl., v., p. 43 (1855); Lesson, 

 Spec. Mamm., p. 74 (1840); Martin, Mammif. An., p. 

 543 (1841) ; Gray, P. Z. S., 1868, p. 182 ; id., Cat. Monkeys 

 Brit. Mus., p. 23 (1870); Sclater, P. Z. S., 1893, p. 254; 

 Schlegel, Mus. Pays-Bas, vii., p. 82 (1876). 



Characters. — Similar to C. grayi^ but differs in the yellow 

 forehead being interrupted in the middle by only a few black 

 hairs, and not by a streak ; the whiskers paler; the back part 

 of the head, the fore part of the back, and the sides grizzled, 

 the hairs being black, ringed with white ; while down the 

 middle of the back to the base of the tail runs a broad black 

 stripe. 



Distribution. —Fernando Po. 



XXXV. THE BLACK-FOOTED GUENON. CERCOPITHECUS 

 NIGRIPES. 



Cenopithecus nigripes, Du Chaillu, Pr. Bost. N. H. Soc, vii., 



p. 360 (i860); Gray, P. Z. S., 1868, p. 182; Scl., 



P. Z. S., 1893, p. 254. 

 Cercopithecus ej'xkbetiii^ var. nigripes, Gray, Cat. Monkeys 



Brit. Mus., p. 23 (1870). 

 Ce?'copithecus pogoniaSy Schlegel, Mus. Pays-Bas, vii., p. 182 



(1876). 



Characters. — Very similar to C. pogonias, but differs in being 

 darker, and in having the dorsal stripe wider and more diffused 

 lower down. It is probably only a variety of the preceding. 



Distribution. — Gaboon, where it was discovered by Du Chaillu- 



