ARCHAEOTHERIUM. 61 
occipital condyles, and constitute the posterior part of the infundibular expansion 
of the root of the zygomatic process. 
The auditory bulla, 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 Kustachian tube externally, and the foramen caroticum 
internally. Externally, the auditory buf 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 zygomatic 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 Choeropo- 
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 Skull—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 animal, 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 
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