6; 



and prominent, they curve upwards and backwards to the 

 base of the median cranial projections, but these are not exca- 

 vated to receive them, as is the case in Dinoceras. The most 

 peculiar feature of the maxillary bones is the pair of large 

 horn-like projections, to which, in conjunction with the nasals, 

 they give rise. These have already been described, and it 

 only remains to add that they correspond in position to those 

 of Dinoceras, and are therefore much further forward than 

 those of Loxolophodon, 



The palatine plates of the maxillaries are long and very 

 narrow ; they are concave transversely, and are separated 

 from each other by a high median ridge. The posterior 

 palatine foramina are small. 



The Palatines are very short, narrow, and concave, and are 

 separated by a ridge. They are considerably excavated on 

 the posterior border, in this respect differing from Loxolo- 

 pJwdon. 



The Pterygoids and the pterygoid plates of the alisphenoid 

 are compressed ; the former join the alveolar borders of 

 the maxillary, which are produced somewhat beyond the last 

 molars. The alisphenoid canal is very large, but rather 

 short. 



The Premaxillaries are of very peculiar shape, somewhat 

 like a u, with one side the lower the longer. The upper 

 portion articulates with the nasals, running along the narial 

 opening to about three inches from the angle ; the free por- 

 tion is short, slender, and tapering ; it is curved downwards 

 and slightly inwards ; the premaxillaries do not meet, leaving 

 the incisive foramen unenclosed, and are edentulous. At the 

 end of the upper portion there are prominent processes for 

 the attachment of the muscles of the proboscis, which prob- 

 ably resembled that of the tapir. 



The anterior narial opening is very large, but is consider- 

 ably concealed bv the overhanging of the nasals. There is no 

 osseous septum between the nostrils. The posterior nares 

 are much smaller, being especially contracted in width ; it is 

 divided above by the Vomer, which is very short, and does 

 not reach the palatines. The nasal cavity thus formed is 

 long, straight, and gradually narrows backwards. 



Of the Mandible we have but a small portion of the right 



