247 



ports three principal tubercles or cusps, two on the outer and one on 

 the inner side ; there are two smaller elevations, with a depression on 

 the summit of each situated in the middle of the crown, and the whole 

 is surrounded with a ridge, which is developed into a small cusp at the 

 anterior and external angle of the tooth. These teeth form the principal 

 difference between the dentition of the present genus and that of the 

 Chaeropotamus, in which the corresponding false molars are relatively 

 smaller and of a simpler construction, having only a single external 

 pyramidal cusp with an internal transverse ridge or talon at its base. 

 The true molars, three in number on each side, closely correspond in 

 structure with those of the Chaeropotamus. They present four principal 

 conical tubercles situated at near the four angles of the quadrilateral 

 grinding surface. 



Each transverse pair of tubercles is connected at the anterior part 

 of their base by a ridge, which is raised midway into a smaller conical 

 tubercle with an excavated apex. The crown of the tooth is surrounded 

 by a well-marked ridge, which is developed, as in the third and fourth 

 false molars, into a sharp-pointed cusp at the anterior and external angle 

 of the tooth. The hindmost molar is more contracted posteriorly, and 

 its quadrilateral figure less regular than the two preceding molars. 



The sockets of the canines or tusks indicate that these teeth were 

 relatively as large as in the Peccari ; and that they were directed down- 

 wards as in that species, and as most probably also in the Chaeropotamus. 

 The temporal muscles were as well developed as in the Peccari, the 

 depressed surface for their attachment, extending on each side of the 

 cranium as far as the sagittal suture. 



The frontal bones are divided by a continuation of the sagittal suture. 

 The nasal suture runs transversely across the cranium parallel with the 

 anterior boundary of the orhits. 



The lachrymal bone reaches a very little way upon the face The 

 external angle of the base of the nasal bone, which is of considerable 

 breadth, joins the lachrymal, and separates the superior maxillary from 

 the frontal bone. The anterior margin of the molar bone encroaches a 

 little way upon the face at the anterior boundary of the orbit. 



