50 CEBIDE. 
Var.? or artificially distorted. Hair of crown radiating from 
central line forming an oblong crest. B, M. 
C. cristatus, Gray, IS. 
Hab. Brazil. 
7. Cebus xanthocephalus. The Monk Cebus. B.M. 
Far short, stiff, black- and yellow-varied; crown, temples, whis- 
kers, chin, shoulders, haunches, arms, legs, and tail black; back 
and sides, especially behind, yellow, more or less black-washed ; 
sides of neck, chest, and front of shoulders yellow. The hair of 
the crown reflexed, short; forehead and temples whitish yellow. 
Var. 1. Shoulders and loins pale-yellow; outside of thighs and 
base of tail reddish. 
Var. 2. Blacker ; forehead whiter. 
Cebus xanthocephalus, Spix, Bras. t.3 (good). C. monachus, Fischer, 
C. cucullatus, Spiz, Bras. t. 6. 
Hab. Paraguay; Rio Janeiro, Spix. 
See Cebus olivaceus, Schrank, Wagner, Schreb. v. t. 8. 
8. Cebus albifrons. The White-fronted Cebus. B.M. 
Pale reddish brown; back and, especially, the outside of limbs 
redder ; face, forehead, throat, shoulders, and chest white. Tail with 
rather long hair; hair of the crown short. _ 
C. albifrons, Gray, P. Z. S. 1865! not Geoffroy. 
Hab. South America. 
9. Cebus hypoleucus. The White-throated Sapajou. B.M. 
Black; forehead and front of crown, neck and sides of head, 
shoulders and chest white; face pale flesh-coloured. 
Sai & gorge blanche, Buffon, H. N. xv.t.9; Audebert, t.5; F. 
Cuv. Mamm. Lith.t, Simia hypoleuca, Humboldt, Obs. Zool. p. 337. 
Cebus hypoleucus, Geoff. Ann, Mus. xix. p. 111. 
Hab. Central America; Guiana ; Caracas, Salvin. 
10. Cebus leucocephalus. The White-headed Cebus. B.M. 
Fur dark reddish brown, very obscurely punctulated. Head to 
the front edge of ears white; crown with a short narrow central 
black streak ; feet blackish. 
Cebus leucocephalus, Gray, P. Z. S. 1865, fig. ! 
Hab. Columbia. © . 
See Cebus versicolor, Puchéran, Rev. Zool. 1845, p. 335; I. Geoff. 
Cat. p. 47. Without frontal streak, and tail paler, perhaps 
discoloured. Hab. Columbia. 
