SYNOPSIS OB THE SIMIADJJ. 267 



GENUS XXII. Aotes, HUMBOLDT. 

 Head round, proportionally large ; muzzle short ; facial angle 



about 60 ; separation of the nostrils narrow ; ears small ; tail 



longer than the body ; not prehensile ; nails flat ; eyes and habits 



nocturnal ; live in pairs. 



PLATE XXIV. 1. AOTES TRIVIROATUS, The Douroucouli . 

 Simia trivirgata, Douroucouli, Humb. Obs. Zoo/, i. p. 

 307 and 358. Aote Douroucouli, Desm, Mamm. p. 88 ; 

 Illig. Prod, p. 71. Gray ; the belly reddish- yellow ; fore- 

 head marked with three dark longitudinal stripes. Inhabits 



thick forests on the banks of the Cassiquaire. 

 t 



GENUS XXIII Pithecia, DESMAREST. 



Head round ; muzzle short ; facial angle 60 ; canine teeth 



very strong ; cars of middle size ; tail shorter than the body, and 



covered with very long hairs ; nails claws-like, short, and bent ; 



habits nocturnal. 



PLATE XXV 1. P. SATANus,The Cuxio Couxio, Geoff. Ann. 

 du Mus. xix. p. 115 ; Humb. Obs. Zool. i. p. 314. pi. 

 27. Saki Couxio, Desm. Mamm. p. 89. Hair brownish- 

 black; furnished with a thick beard; breast and belly 

 nearly hairless ; female brownish-red. Inhabits the banks 

 of the Oronooko. 



2. P. CHIROPOTES, Hard-drinking Saki Capuchin, Geoff. 



Ann. du Mus. xix. p. 116; Humb. Obs. Zool. i. p. 

 358. Saki capuchin, Desm. Mamm. p. 89. Reddish- 

 brown : hair of the head thick, divided in the middle in 

 two tufts; beard long and thick; tail blackish-brown. 

 Inhabits the forests of the High Oronooko, to the south 

 and east of the Cataracts. 



3. P. RUFIVENTER, Red-bellied Saki Saki a ventre noux. 



Geoff. Ann. du Mus. xix. p. 116 ; Desm. Mamm. p. 90. 

 Simia run* venter, Humb. Obs. Zool. i. p. 358. Brown, 

 tinted with reddish ; belly reddish-brown ; hair on th 



