NATURAL SCIENCES OP PHILADELPHIA. 



51 



tal suture, the rami of the lower jaw are much broader, approaching in shape 

 that of the Howlers. Isidore St. Hilaire in his memoir upon the classification 

 of the Quadrumana, (Arch, du Mus. vol. ii. p. 449,) mentions a specimen having 

 the thumb absent on one hand. 



Sapajol* belzebuth. 

 Simia belzebuth, Brisson, Regne Animale, vol. 1, 1756, p. 194. 

 Ateles belzebuth, Geoff., Ann. du Mus., vol. vii. 1806, p. 260. 

 Ateles belzebuth, Humb., Receuil, vol. i. 1811, p. 337 and 353. 

 Oebus Brissonii, Fischer, Synopsis, 1829, p. 40. 

 Marimonda et Aru, Humb. 

 Icon. Ann. du Mus., vol. vii. T. 16. 



S. niger; palmis tetradactylis; ventre cruribus etcaudae parte interiore ochreo- 

 leucis. 



Hab. Guiana, Brazilia et Peruvia. 



General color brownish-black, becoming reddish brown in the lumbar region ; 

 belly, neck, and internal surface of limbs yellowish-white ; inferior surface of 

 tail reddish-brown. Face naked and black; tip of nose sometimes reddish- 

 brown, sometimes black. 



Humboldt states that in captivity this species is cross and fretful, frequently 

 attacking those from whom it habitually receives its food. Its cry is a repeti- 

 tion of Ou-a, Ou-a, and may be heard to a great distance. 



Its geographical range extends across the entire continent from Guiana to 

 Peru. I have met with no specimens collected south of the Amazon. Hum- 

 boldt found it quite common on the banks of the Orinoco. 



Skull No. 362, Academy Antro-posterior 4-3 ; occipito frontal 3-3 ; bitem- 

 poral 2-2; bi-parietal 2-3; cranial capacity 5; facial angle 56. 



Lower Jaw. Angle to symphysis 2-8; angle to condyle 1-45 ; angle to coro- 

 noic process 1-6; posterior molar to coronoid process 1 05. 



Sapajou geoffroyii. 

 Ateles Geoffroyii, Kuhl, Beitrag, 1820, p. 26. 

 Ateles fuliginosus, Kuhl, Beitrag, 1820, p. 25. 

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

 Ateles melanochir, Desmarest, Mam., 1820, p. 76. 

 Eriodes frontatus, Gray, Voy. of Sulphur, vol. i. 1844, p. 1. 

 Ateles variegatus, Natter er* in Reichenbach's Atlas, pt. I, p. 62. 

 Icones, Voyage of the Sulphur, T. i. Foeminaet juvens. Reichenbach's Atlas, 

 pt. 1, fig. 154. 



S. ater ; ventre et artibus interne stramineis ; macula triangulari frontali 

 aurea aut nigra ; dorso nigro. 



Foem. straminea aut fuliginosa ; genubus et manibus nigis ; macula frontali 

 nigra. 



Hab. Brazil et Bolivia. 



Adult male, back, external surface of limbs and tail glossy-black ; belly, 

 throat, internal surface of limbs, and inferior portion of tail bright-yellow, 

 upon the forehead a triangular spot of bright golden yellow, the hairs oom- 



* I have never met with Natterer's original description. I find it quoted in Ueichenbach'e Atla.s, 

 the figure ie that of the ailult of this species, though the frontal spot is too large. 



1882.] 



