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The pterygoids are large bones, which show three processes» 
an anterior one, becoming very thin in front, and underlying the pala- 
tines; a posterior one, forming an extensive vertically expanded plate, 
and an external very massive ectopterygoid process. The anterior 
process is the longest; the inner edge is bent vertically upwards, and 
lies very close to, or even touches the corresponding part of the oppo- 
site pterygoid. The lower portion is covered nearly completely with 
small conical teeth, those on the outer and posterior region are the 
largest. A groove extends between this tooth-bearing region and a 
ridge marking the origin of the vertical plate. There are a few small 
teeth in the groove and the ridge also bears a series of small teeth. 
The vertical posterior processes were connected by ligament with the 
quadrate region. The very strong and massive ectopterygoid process 
bears, at its ventral rounded edge, eleven comparatively large teeth 
which are placed in distinct alveoles, and replaced from behind. 
The pterygoids were attached to the basipterygoid processes of 
the basisphenoid by ligament. The connection between the posterior 
processes with the quadrate region was also ligamentous. 
It is very probable that a small ectopterygoid existed, there 
is a distinct face for such a bone on the inner face of the jugal where 
it meets the maxillary. The distal faces of the ectopterygoid processes 
are not preserved, being broken off on both sides. 
The palate is a strong bone, becoming more slender posteriorly. 
It is connected with the maxillary by the entire external edge by su- 
ture. The articular face is broadened and vertical. The inner por- 
tion of the ventral side of the palate is covered with small conical 
teeth. The region bordering the posterior nares is preserved and de- 
termines their position, their posterior ends being just behind the large 
canine tooth. 
The vomer is not represented by any portion; but there is very 
little doubt, that it was paired and covered with teeth. 
The lower jaw is represented by three bones, the articular, 
dentary and a third bone (angular?). The dentary contains twenty- 
seven teeth, which are located on a thickened ridge in alveoles. The 
first tooth is slender and conical, slightly recurved. The succeeding two 
are nearly as large as the canine above; the remaining teeth are all 
small and recurved. The lower edge of the dentary is thin, and 
marked internally by strong suture-lines. The symphysis is short. The 
articular shows two parallel ridges, for articulation with the qua- 
drate. The angular(?) is an incomplete element attached to the 
lower edge of the articular. 
