48 CEBIDA, 
varied.—C. Apella, @. elegans, C. capucinus, C. wanthocepha- 
lus, CO. albifrons; C. flavescens, C. robustus, C. annellatis, C. 
chrysopus, C. subcristatus, C. capillatus. 
I. Hair of the crown bent back, round the face reflexed, forming 
a short crest over each eyebrow. No. 1. 
II. Hairs of the crown short, bent. back ; those on the sides of the 
dark spot often elongated, forming two more or less erect 
crests or tufts. Nos. 2, 3, 4, 5. 
III. Hair of the crown short, reflexed, not forming any crest. 
Nos. 6-11. 
IV. Hair of the crown erect, elongate, forming a more or less 
high central crest. Nos. 12, 13. 
V. Hair of the crown radiating from a centre, bent forward in 
front, and forming a superciliary crest. Nos. 14, 15. 
VI. Hair of the crown elongate, diverging in all directions, form- 
ingacap. No, 16. 
I, Hair of the head rather elongate, reflexed ; round the face reflexed, longer, 
forming a short crest over each eyebrow; of cheek short, adpressed, 
Toes rather elongate. ; ; ; 
1. Cebus leucogenys. The White-cheeked Cebus. 
Blackish ; hair soft, elongate, silky, with thick underfur, of head 
shorter, of circumference of the face reflexed; cheek and temples 
yellow. 
Cebus leucogenys, Gray, P. Z. S. 1865, t. ! 
Hab. Brazil. 
See C. cucullatus, Spix, Bras. t.6, which seems to have a head 
somewhat like this species; but it is yellow, with a brown 
hood. I have not seen any like it. 
Il. Hairs of the crown short, reflexed ; those on the sides of the dark patch 
often elongated, elevated, forming two more or less elevated crests. 
2. Cebus Apella. Zhe Apella. 
Fur thick, rather harsh, reddish brown, darker on the middle of 
the back, tail, and legs; forearms, crown-spot, and whiskers black 
or blackish ; front of the shoulders paler or yellow; the crown- 
spot broad, often produced on the sides into moro or less thick 
elongated longitudinal crests. 
Sapajou brun, Buffon, xv. t. 4, p. 87. S. cornu, Buffon, Supp. vii. 
Biania ee ine, (rouage, Cebus ‘Apella, ; Geoff. Tat 
horned) Cebus fatuellus, Geof. C.macrocephalus, Spiz, Bras. t. 1 
(no crests). 
Var. Fur pale yellowish; whiskers yellow. B.M. 
Hab. Brazil. A very variable species. 
