42 CEBIDA. 
or none. Lower jaw not dilated behind, Chin and throat nearly 
bald. The hair of the head directed forwards, of the forehead some- 
times reflexed. 
Sapajou, Lacép. 1800; Slack, Proc. Acad, Philad, 1862, p. 509. Ateles, 
Geoff. Ann. du Mus. 1806. 
Stomach slightly subdivided, approaching in this respect the long- 
handed Monkeys of India and Africa. 
a. Inside of the legs coloured like the back. Species 1-10. 
b. Inside of the legs white. 11, 12. 
* The inside of the legs coloured like the back. 
1. Ateles ater. The Black-faced Coaita. B.M. 
Black, face black; hair of crown short, of forehead moderate. 
Young. Brown. 
A. paniscus, var. cayennensis, Geoff. A. ater, F. Cuv. Mamm. 
Lithog. t. 
Hab. Brazil. 
2. Ateles paniscus. The Coaita. B.M. 
Black; face flesh-coloured; orbits prominent; fur of forehead 
elongate, projecting. 
Coaita, Buff, H. N. xv. 16, t.1. Simia paniscus, Linn. S. N. i. p. 27. 
Ateles paniscus, Geoff. 
Var. Thumb more or less rudimentary (sometimes only developed 
on one hand). B.M. 
A. subpentadactylus, Desm. Simia chameck, Humb. Chameck, Buff. 
Hi. N. xv. p. 21. A. pentadactylus, Cuv.; Geoff. I. ¢. vii. 
Hab. Guiana; Brazil; Peru. 
3, Ateles fusciceps. The Brown-headed Spider Monkey. B.M. 
Black ; hairs rather long, shining, crisp, the longer ones with indi- 
stinct brownish tips ; crown of the head rusty brown. 
Ateles fusciceps, Fraser, MS, 1845; Gray, Proc. Zool. Soc. 1865! 
Hab. South America. 
4. Ateles grisescens. The Grizzled Spider Monkey. B.M. 
Fur moderate, black, with silvery-white hairs intermixed; the 
underside of the tail grey; the hair of the forehead rather elongate. 
The Grizzled Spider Monkey, Sclater, Cat. Anim. Zool. Gard. 1865, 
p. 6. A. grisescens, Sclater, MS.; Gray, P. Z. S. 1865! 
Hab. South America. 
5, Ateles cucullatus. The Black-capped Spider Monkey. B.M, 
Fur very long and flaccid, black, silvery grey ; the crown and nape, 
the hands, and feet black; sides of the rump blackish ; hair of tho 
