AKCHAEOTHEKIUM. 61 



occipital condyles, ffhd constitute the posterior part of the infundibular expansion 

 of the root of the zygomatic process. 



The auditory bulte, broken in the specimen, appear to have been broad and 

 convex, but compared to those in recent suilline animals were feebly developed. A 

 strong conoidal process projected from them anteriorly downward and forward, 

 bounding the passage of the Eustachian tube externally, and the foramen caroticum 

 internally. Externally, the auditory bullae are prolonged into a broad and strong 

 auditory process. 



The external auditory meatus is circular, is relatively considerably larger than 

 in the Hog, and is remarkable for the large infundibular expansion which leads to 

 its entrance. 



The inferior border of the root of the zj^gomatic process is thick and convex, 

 and is prolonged outward and downward to the glenoid articulation. 



The latter in position and form resembles that of the Peccary; but it is relatively 

 broader and more shallow, or its anterior and posterior tubercles are shorter. 



From the glenoid articulation, the zygoma converges to the face and expands 

 outward and downward; and where constituted by the antero-inferior margin of 

 the malar bone, it forms a prominent acute edge. 



The posterior palatine notch, as in the Tapir, Rhinoceros, and extinct Ghoeropo- 

 tamus, extends to some part of the space intervening to the penultimate molar 

 teeth. It is about three-fourths of an inch wide at its commencement, and has 

 nearly parallel sides and a concave bottom. 



The hard palate is concave, and parallel at its sides, and is not roughened as far 

 as preserved in the specimen. 



The palate plates of the palate bones are short, as in the Hog ; and the posterior 

 palatine foramina are situated in the transverse palatal suture. 



Form, Relations, and Connections of the Bones of the Skihll. — The parietalia are 

 fused at the sagittal crest into a single symmetrical bone, which descends on each 

 side in advance of the pars squamosa, to the bottom of the temporal fossa to join 

 the sphenoid bone, and anteriorly is notched for the adaptation of the os frontis. 



The pars squamosa of the temporal bone appears to be almost entirely extended 

 outwardly to form the deep anterior face of the root of the zygomatic process ; and 

 its suture descends so rapidly that its most anterior part is only a little over an 

 inch from the position of the meatus auditorius. 



The OS frontis, even in the young anim^il, is single, and it contributes to nearly 

 one-third of the extent of the temporal surface. Anteriorly, it terminates in an- 

 gular processes, which extend in advance of the ossa lachrymalia, and for more 

 than two inches along the sides of the ossa nasi. 



The bottom of the fronto-nasal suture is nearly on a line with the anterior mar- 

 gin of the orbits, from which position the ossa nasi gradually widen to the points 

 of the angular processes of the os frontis, and then, in the specimen, in a more 

 gradual manner decrease in width to their broken extremities. 



The facial surface of the lachrymal bone forms an oblong square measuring nearly 

 two inches antero-posteriorly. 



The maxillo-malar suture descends in the same oblique line, as that anterior to 

 9 



