MACACUS. 



as England, prevented my examination, in the first instance, 

 of the skeletons of the recent Quadrumana; and it was 

 not until I had tried all the more probable analogues of the 

 fossil fragment in the lower forms of the Mammalia, that I 

 began to test it by the side of the jaws of the Apes and 

 Monkeys. 



Fig. 3. 



Fiff. 4. 



The grinding surface of the fossil tooth (fig. 3, m, 3,) 

 supports five tubercles, the four anterior ones being arran- 

 ged in two transverse pairs, the fifth forming a posterior 

 heel, or talon. This conformation of the crown of the 

 last molar in the lower jaw characterises two families of 

 Catarrhine, or Old World Monkeys, viz., the Semnopithecida, 

 including the genera Colobus and Semnopithecus, and the 

 Macacida, including the genera Macacus, Cynocephalus, 

 and Papio. 



