42 CEBID^. 



or none. Lo^vcr jfiw not dilated behind. Chin and throat nearly 

 bald. The hair of the head directed forwards, of the forehead some- 

 times rcflcxcd. 



Sapajou, Lacep. 1800; Slack, Proc. Acad. Philacl. 1862, p. 509. Ateles, 

 Geoff. Ann. du Mus. 1806, 



Stomach slightly subdindcd, approaching in this respect the long- 

 handed Monkeys of India and Africa. 



a. Inside of the legs colonred like the back. Species 1-10, 

 h. Inside of the legs white. 11, 12. 



* The inside of the legs colowcd like the back. 



1. Ateles ater. The BJaclc-faced Coaita. B. M. 



Black, face black ; hair of crown short, of forehead moderate. 

 Young. Brown. 

 A. panisciis, var. cayennensis, Geoff'. A. ater, F. Cuv. Mamm. 

 Lithog. t. 



Hah. 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. Simla 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. subpeutadactylus, Desm. Simia cliameck, Ilumh. Chameck, Btff. 

 H. N. XV. p. 21. A. pentadactylus, Cue. ; Geoff. I. c. y\\. 



Hah. Guiana; Brazil; Peru, 



3. Ateles fusciceps. The Brown-headed Spider Monhey. B. M, 

 Black ; bail's rather long, shining, crisp, the longer ones with indi- 

 stuict bro^vnish tips ; crown of the head rusty brown. 



Ateles fusciceps, Fraser, MS. 1845 ; Gray, Proc. Zool. Soc. 1865 ! 

 Hcd}. South America. 



4. Ateles grisescens. The Grizzled Spider Monl-ey. 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. gi'isescens, Sclater, MS. ; Gray, P. Z. S. 1865 ! 



Hah. South America. 



5. Ateles cucullatus. The BlaeJc-capped Spider Monkeij. B. M. 



Fiu- very long and flaccid, black, silvery grey ; the crown and nape, 

 the hands, and feet black ; sides of the rump blackish ; hair of the 



