174 PHILOSOPHY OF ZOOLOGY. 



7. CYNOCEPHALUS. Snout lengthened, with terminal 

 nostrils. 



B. Nails compressed, pointed. Thumbs of the hands 

 scarcely separate from the fingers. 



8 HAPALE. Ouistiti. Head round ; face flat ; but- 

 tocks hairy ; destitute of cheek-pouches. 



Grinders, twenty-four in number. 



A. Tail prehensile. 



a. The part of the tail used to grasp objects naked. 



9. MYCETES. Head pyramidal. The os hyoidis has a 

 singular vesicular enlargement communicating with the 

 larynx. Simia seniculus and Beelzebub of LIN., belong to 

 this genu& 



10. ATELES. The thumb of the hand is concealed un- 

 der the skin. This generic distinction observable in the 

 Simia paniscus of LIN. ; ought probably to be employed to 

 form the primary divisions of the quadrumanous animals. 



b. Tail hairy. 



1. CEBUS. Thumbs distinct;. Simia appella of LIN. 



B. Tail not prehensile. 



12. CALLETRIX. Simia Pithecia of LIN. 



Lemuridce. 



Incisors either not four in number in each jaw, or placed 

 on a divided line. 



A. Incisors in the lower jaw six in number. 

 a. Furnished with a tail. 



13. LEMUK. Macauco. The Lemur Macaco is the 

 type of this genus. 



14. OTOLICNUS. The tarsi are here greatly elongated 

 and disproportionate. The motions are slow. 



