24 simiad^. 



13. Cercopithecus Campbellii. B. M. 



Blackish olive, yellow-washed ; throat, thighs, belly, and inside of 

 limbs whitish ; forehead and crown yellow-varied ; feet and outside 

 of limbs and tail black. 



Cercopithecus Campbellii, Waterh. T. Z. 8., 1838, p. 01 ! Martin, i. 

 p. 544! C. Burnettii, Gray, Ann. # Mag. N. II. 1842, p. 250 ! 



Var. or adult. Larger, sides of the forehead yellow. B. M. 



Var. Tail greyish in the middle of its length. 



Hal. West Africa : Sierra Leone ; Fernando Po, Thompson, 



14. Cercopithecus albogularis. B. M. 



Fur olive black, yellow-washed and yellow-grizzled ; throat, 

 chest, and inside of thighs white ; outside of limbs and end of tail 

 blackish ; tail like back at base, above and beloAV. 



Semnopithecus ? albogularis, Sykes, P. Z. S. 1831, p. 105 ! Cerco- 

 pithecus albogularis, Owen, P. Z. S. 1832, p. 18 ! C. monoides, Is. 

 Geoff. Arch, du Mas. ii. p. 31. 



Hal. East Africa. 



Like C. niona, but of a different colour below, and without the white 

 streaks on the sides. 



15. Cercopithecus samango. 



Fur black, grey-grizzled ; throat, chest, and inside of the thighs 

 yellowish white ; outside of the limbs, and tip of the tail, blackish ; 

 base and underside of tail whitish. 



Cercopithecus samango, Sundevall, K. Vetcnsk. Akad. Forh. 1844, 

 p. 100; Ilornschuch, Arch. Slumd. Beitr. 1844, p. 179. 



Hal. South Africa. 



Very like C. albogularis, but grey, not washed with yellow, and 

 tail white below. 



See C. lumdatus, Tcmm. Esq. Zool. Guinea, p. 37. 



13. CHL0R0CEBUS. 



ITcad oval. Face rather produced. Whiskers rigid, directed back- 

 wards. Fur grizzled; hairs annulated, greenish or reddish. 



When alive the scrotum is green in O. salwus and O. pygerythrus, 

 blue in O. cynosurus ; but these colours are not seen in the preserved 

 skins ; therefore the colour of the scrotum of some of the species de- 

 scribed)from stuffed skins is not known — as C. Lalandii, G. Werneri. 



" I. Face moderate, narrow in front, black. Chlorocelus. 



1. Furred; frontal band black. Species 1. 



2. Fur greenish ; frontal band none, or white. 



