416 



CHAPTER XLVIIL 



ORDERS OF MAMMALIA {Concluded). 

 QUADRUMANA AND BiMAXA. 



Ordeh XVI. QuADRUMANA. — The sixteeiitli order of Mam- 

 mals is that of the Quadrmnaiia, comprising the Apes, Mon- 

 keys, Baboons, Lemurs, &c., characterised by the following- 

 points : — 



The hallux {innermost toe of the hind-Hinh) is separated 

 from the other toes, and is ojJjJosahle to them, so that the hind- 

 feet become prehensile hands. The pollcx {innermost toe of the 

 fore-lirribs) may he wanting, hut when present, it also is usually 

 opposable to the other digits, so that the animal becomes truly 

 <luadrumanous, or four-handed. 



2 2 3 — 3 



The incisor teeth qenercdlu are , and the molars , 



2 — 2 o — o 



vjith broad and tuberctdate crowns. Perfect clavicles are present. 

 The teats are two in number, and {except in Cheiromys) are pec- 

 toral in position, and the placenta is discoidal and deciduate. 



The Qiatdrumana are divided by Owen into three very 

 natural groups, separated from one another by their ana- 

 tomical characters and liy tlieir geographical distribution as 

 follows : — 



Strepsirhina. 



This section of the Quadrumana is characterised by tlie 

 possession of twisted or curved nostrils, placed at the end of 



