446 MAMMALIA. ' 



somewhat arched in some species, and much flattened in others ; 

 with two pectoral teats ; with or without a tail. 



They are gravid from five to seven monthsi and bring forth 

 from one to two at a birth. 



TRIBE I. 



NATIVES OF THE OLD CONTINENT. 



(Simise Catarrhini, Geoflroy.) 



The animals of this tribe have five grinders, crowned with 

 blunt tubercles in each jaw — nostrils divided only by a thin sep- 

 tum — tails, either wanting or short ; some few long, but not 

 prehensile. They inhabit Africa, India, and its islands, 



Sub-Genus 1. — Orangs Proper.— Without callosities on the 

 hinder parts. 



Genus 1. — Troglodytes. — Genffroy. 



Generic Character. — Facial angle 50 degrees ; no cheek 

 pouches, tail, nor callosity on the hinder parts ; arms short ; 

 superciliary ridges distinct. The canine teeth are somewhat 

 projecting, and are close to the incisory and grinding teeth, like 

 those of the human species ; — the head is rounded, and the muz- 

 zle slightly projecting. 



Troglodytes niger. — The Chimpanse. — Plate V*. fig. 1. — 

 See specific description, vol. II. p. 404-. 



Genus 2. — Pithecus. — Cuvier. 



Generic Character. — The incisory teeth are J, canines, \z\, 

 molars, fzt ; total 32. The canine teeth are somewhat larger 

 than the others ; the molars more equal than in man, with the 

 tubercles more produced : the head is orbicular, without a su- 

 perciliary ridge^ While young, the facial angle is 50 degrees, 

 and when adult, 60 degrees. No cheek pouches — ears are 

 rounded, as in the Ibuman species — arms much longer than in 

 man — thumbs rather short — tailless— some of the species with 

 callosities oii the hinder parts. 



Pithecus satyrus.—TuK Orang-Outang — Plate VI. fig. 1. 

 — See specific description, vol. II. p. 404. 



