258 SYNOPSIS OF THE SIMIAM. 



Cynocephale drill, Desm. Mamtn. p. 71. Above greenish- 

 brown tinged with gray, beneath white. Face of males, 

 females, and young, uniform dull black. Under lip red. 

 No furrows on the muzzle. Inhabits Africa. 

 We have deviated from the text of the volume in dividing the 

 Cynocephali. Though very closely allied, and by most writers 

 united either under Cynocephalus or Papio, they are always 

 divided into sections, and we generally prefer an entire separa- 

 tion to divisions of that kind. 



One or two baboons are mentioned by Pennant upon dubious 

 authority, which it is not necessary to introduce here, as proper 

 characters could not be given. 



II. SUB-FAMILY PLATYRRHINI. 



HOWLERS. 

 GENUS XVII Mycetes, ILLIGER. 



Facial angle about 30 ; canine teeth strong ; tail long, prehen- 

 sile, naked at the extremity on the under side ; os hyoides ventri- 

 cose, apparent on the outside ; gregarious ; howling during night ; 

 largest and fiercest of the South American group. 



1. M. SENICULUS, the Mono Colorado, or Red Howler 

 Simia seniculus, Linn. Stentor seniculus, Geoff. Ann. du 

 Mus. xix. p. 107. Mono Colorado, Humb. Ob*. Zool. p. 

 354. Alouate roux, Desm. Mamm. p. 77. Fur reddish- 

 brown, brightest on the" tail and extremities ; under parts 

 nearly hairless ; face naked and black. Inhabits French 

 Guiana, banks of the rivers Madeleine and Darien. 

 PLATE XIX 2. M. URSINUS, the Araguato Stentor ursiuus, 

 Geoff. Ann. du Mus. xix. p. 108. Araguato de Caraccas, 

 Humb. Obs. Zool. pp. 329 and 355. Alouate ourson, 

 Desm. Mamm. p. 78. Entirely reddish-brown, and clothed 

 with long hair on every part ; bearded ; face bluish-black. 

 Inhabits Venezuela, New Barcelona, banks of the Oronooko. 

 Differs from the preceding in the hair being very long, and in being 

 clothed on the under parts. 



