CEEODONTA. 297 



IS prominent inwards, but is not elevated. A weak external cinguluni. In 

 the first and second true molars the external cusp is double, and stands 

 considerably within the external border, less so on the first than in the 

 second tooth. In the first the anterior border is transverse, and the poste- 

 rior border considerably longer and oblique. The internal angle is promi- 

 nent, but without cusp; the anterior external basal lobe is very small, while 

 the posterior is elongate, and has an acute edge, which forms with the pos- 

 terior side of the posterior cone a sectorial blade. The latter feature is seen 

 in a more striking degree in the second true molar; the transverse diameter 

 is greater, so that the posterior border is less oblique. The anterior border 

 is transverse, and the external border is openly emarginate, which is not the 

 case with the first true molar. The last true molar is entirely transverse 

 and narrow. It has one median cusp, which is connected by a cutting ante- 

 rior edge with the internal tubercle and the external border. 



The mandibular ramus is compressed, and the horizontal portion is 

 rather deep, most so below the last molars. The inferior border is gently 

 convex downwards, and then rises below the coronoid process. It is 

 slig'htly decurved again below the condyle, and is then recurved, terminat- 

 ing in the apex of the hook-like angle. This hook is larger than in most Creo- 

 donta and Carnivora, projecting a short distance beyond the condyle. Be- 

 tween them the posterior border is deeply excavated. The condyle has its 

 superior border nearly straight. Its posterior articular face extends to the 

 inferior side at the internal extremity, and is cut off obliquely from the mid- 

 dle below to the external superior extremity above. The coronoid process is 

 wide anteroposteriorly, and has a regularly convex superior border. This 

 terminates in an angle looking downwards and backwards above the con- 

 dyle. The masseteric fossa is well marked, but is not defined below. 

 There are two mental foramina, one below tlie third, the other below tlie 

 anterior part of the premolar. 



The inferior canine is a robust tooth, with rather short crown. Both 

 internal and external faces display a median longitudinal angle. There 

 are short spaces before and behind the first premolar tooth. The latter has 

 two roots and a short crown, which is obliquely truncate posteriorly. The 

 second premolar has a larger crown than the thu-d. It has no anterior or 



