222 CLASS MAMMALIA. 



name of howling monkeys. The prehensile part of 

 their tail is naked and callous underneath. 



The Common Alouatte, (Simia Seniculus,) (vulg. Red 

 Howling Monkey,) Buff. Sup. VIL XXV. 



Inhabits the woods of Guiana where they live 

 in troops. About the size of a strong fox. A 

 reddish maronne colour, rather lively. 



The Ouarina, (Simia Beelzebut, L*.) vulg. Brown Howler, 

 Car ay a of Azzara, Guariba of Margr. 



Common to Brazil and Paraguay. The male is 

 black above, red below. The female brownish. 



The Common Sapajous 



Have the head very flat and the muzzle not promin- 

 ent. (Facial angle, 60°.) There are some of these 

 whose thumbs of the forehand are concealed under 

 the skin, and the prehensile part of the tail naked 

 underneath. Mr. GeorTroy makes a genus of them 

 under the name Ateles. The first species, the 

 ChameJc (Ateles pentadactylus , Geoff.) differs from the 

 others in having the thumb more projecting, though 

 it consists but of a single phalanx, and without a 

 nail. The lower jaw is also as high as that of the 

 Alouattes, and the hyoi'd bone extremely similar to 

 theirs. The hair is altogether black. 



* The Beelzebut of Brisson is a Coaita. 



