200 THE SKULL. [CHAP. 



The palate is long and narrow, and extends posteriorly a 

 short distance behind the last molar teeth. The internal 

 pterygoids end in well-marked stout hamular processes. The 

 glenoid surface of the squamosal is very much extended, 

 but not bounded externally by a projection from the malar 

 as in the Pig, and the inner half of its posterior margin is 

 produced into a tolerably well marked postglenoid process. 

 The paroccipital process is long and conical, but far less 

 conspicuous than in the Pig. The tympanic bulla is pro- 

 portionately smaller, and of a trihedral form, ending in an 

 antero-inferior pointed process. Its interior is filled with 

 cancelli, as in the Pig. As in that animal, there is a long 

 narrow meatus auditorius, directed upwards and backwards 

 in a fissure between the postglenoid and post-tympanic 

 processes of the squamosal, the floor being formed by 

 a compressed, ridged prolongation of the tympanic, 

 which is at a very early age completely fused with the 

 squamosal. The periotic is very small, remains longer 

 distinct, though ultimately ankylosing with the conjoined 

 squamoso-tympanic, and has only a rudiment of a mas- 

 toid portion, which is quite confined to the interior of the 

 cranium. 



The tympanohyal is slender, ankylosed to the back of the 

 tympanic, and in the adult skull sunk in a deep fossa, 

 between that bone and the exoccipital, which also gives exit 

 to the facial nerve. 



The mandible is of immense size and weight. The 

 condyles rise very little above the level of the molar teeth. 

 The coronoid process is small and much recurved. The 

 angle is greatly expanded and everted, rounded behind, and 

 terminating below in a distinct process, projecting down- 

 wards and forwards. The horizontal rami are compressed 

 in their middle portion, but widen anteriorly into a very 



