555 



process from the canine alveolus to a mere ridge. The first premolar is wanting on the left 

 side, upper jaw, and on both sides of the lower jaw ; where also only minute rudiments of the 

 second premolars are visible. 



Purchased. 



3331. The skull of a male Babyroussa (Sus Babyrussa). 



As compared with the Sus Scrofa and Sus larvatus the occiput is broader and lower : the 

 mastoids are larger, the temporal fossae more approximated on the upper part of the cranium : 

 the bony palate more produced beyond the last molars, which are relatively smaller. The 

 first premolars in the upper jaw and the first and second premolars in the lower jaw are not 

 developed : the second premolar is early shed and usually wanting in the upper jaw. The 

 outer incisors are not functionally developed and are usually wanting in the upper jaw. The 

 canines are longer and more slender, and the sockets of the upper ones are bent more di- 

 rectly upwards ; the naso-maxillary part of the cranium being slightly compressed between 

 them. A remarkable peculiarity is also presented by the fossae at the inner side of the base 

 of the pterygoids, which lead to sinuses communicating on one or both sides with the sphe- 

 noidal sinus. The sockets of the antepenultimate premolars, p 2, and the rudiment of that 

 tooth on the left side are preserved in the upper jaw : the rudiment of the corresponding 

 premolar is retained on the left side of the lower jaw. 



Hunterian. 



3332. The skull of a male Babyroussa. 



All the molars are much worn, but the temporal fossae are separated by a space of nearly 

 an inch upon the parietal. The internal divisions of the pterygoid fossae are large, deep, and 

 well-defined ; the right one communicates with the sphenoidal sinus. The dried integument 

 of the snout and the fore part of the face remains attached, and shows the perforation of the 

 integument by the long upper ascending and recurved canines. 



Hunterian. 



3333. The skull of a male Babyroussa. 



The enamel has been abraded from the summit of the second as well as the first true 

 molar. The canines in both jaws, and the incisors, are wanting. The temporal fossae are 

 divided by merely a ridge upon the parietal. 



Hunterian. 



3334. The skull of a male Babyroussa. 



The enamel has been abraded from the summit of the first true molar, TO 1, and partially 

 from that of the second true molar, and the premolars. In the upper jaw the socket for the 

 two-fanged antepenultimate premolar, p 2, may be seen, in advance and on the inner side of 

 the three-fanged penultimate premolar, p 3. The pterygoid sinuses are large and complex. 



Presented by Col. Everest. 



