510 



PROCEEDINGS OF THE ACADEMY OP 



upon the living animal, it appears to be more sensitive than the hand itself. This 

 Bpecies is found in Guiana and Northern Brazil. 



Skull No. 189 in collection of Academy Antro-posterior 4-2 ; occipitofron- 

 tal 3-2; bi-temporal 2-25; bi-parietal 25; cranial capacity 6 inches; facial 

 angle 55. 



Lower Jaw. Angle to symphysis 2-5 ; angle to condyle 1-8 ; angle to coro- 

 noid process 1-8; posterior molar to coronoid process 1-05. 



Sapajou ater. 



Ateles ater, F. Cuvier, Mammifers, 1823. 

 Cebus ater, Fischer, Synopsis, 1829, p. 40. 

 Le Cay on. 



Icones, Cuv., Mammifers, (Icon sine numero.) Regne Animal (editio Fortin. 

 Masson & Co.), Mammifers, T. xvi. 



S. ater ; palmis tetradactylis ; facie nigra. 



Junior, brunneus. 



Hab. Guiana. 



Entirely black; thumbs of anterior hands wanting; face black, the superior 

 portion naked, the chin covered with short stiff black hairs, among which are 

 scattered a few of a white color ; hairs of forehead directed posteriorly, forming 

 a tuft. 



This Bpecies closely resembles the paniscus, but may always be distinguished 

 by the color of the face, and the direction of the hairs of the forehead. The 

 color of the young is much lighter than that of the adult. A young specimen, 

 (No. 4618) in the Smithsonian collection, has a decided brown tint upon the 

 back and external surface of limbs. 



Its habitat is Guiana. 



Sapajou pbntadactylus. 

 Ateles pentadactylus, Geoff., Ann. du Mus., 1806, t. vii. p. 267. 

 Atelea chamek, Humb., Rec. des Obs. Zool., 1811, p. 353. 

 Ateles subpentadactylus, Desmarest, Mammalogie, 1820, p. 77. 

 Chamek, Buffon and Humboldt. 

 Icon, Reichenbach, Naturgeschicte der Affen, vol. i. T. 148. (Fig. pessima.) 



S. ater ; palmis subpentadactylis ; pollice minimo ; facie nuda -upreaque. 



Habitat. Guiana. 



Entirely black ; anterior thumbs replaced by a small nailless tubercle, face 

 naked, and of a copper color. 



The coloration of this species is similar to that of the ater and paniscus, but 

 it may readily be distinguished by the presence of a tubercle upon the anterior 

 hands in the position of the thumb ; the hairs of forehead are long, projecting 

 anteriorly, as in the paniscus, the skull differs materially from that of any other 

 of the genus in being compressed laterally, forming a slight crest at the sagit- 



[Nov. 



