165 



plate. The condyloid process, long and sloping very much back- 

 ward, barely rises to the level of the coronoid, and its articu- 

 lar facet, slightly compreised antero-posteriorly, stands very little 

 a^bove the level of the teeth. The posterior border, in its 

 lower half, becomes expanded, and curls forward so as to form a 

 well-marked masseteric fossa. The angle is continued into a con- 

 spicuous, considerably incurved angular process, wide and strong at 

 its origin, but rapidly tapering to a styliform extremity. There is 

 a large inferior dental foramen at the point of intersection of the 

 long axes of the coronoid and angular processes, also a wide and 

 very shallow mylo-hyoid groove. The dental foramen corresponds 

 to the space between the last premolar and first molar. 



DENTITIOX. 



(PI. VI. and fig. 2, PI. VII.) 



Some variation seems to exist in the number of the teeth, more 

 particularly in the premolar region of the lower jaw\ The following 

 description is that of a specimen in which they appeared most com- 

 plete, but it is not the same as that figured in the plate, where one 

 tooth, described in the text, is absent from the lower jaw, as 

 will be pointed out in the proper place, but, in all other essential 

 particulars, the description will apply to any of the specimens. 



Maxilla. — Within the premaxillary boundary there are three 

 simple conical or peg-like teeth, the anterior being the largest in 

 all measurements, and having its axis inclined inwards towards 

 its fellow of the opposite side, wdiile the hinder two are nearly 

 vertical. In one dry skull, evidently that of an old specimen, 

 there is a distinct "mark" in all three; in another and younger 

 skull the cutting surface of the most anterior is marked by a 

 groove. Between these incisors there is an interval nearly equal 

 to the width of a tooth of the series. 



Just behind the premaxillary suture there is a small tooth 

 similar to, but rather smaller than, the hindermost incisor, the 

 apex of which is inclined a little forward. This, from its position, 

 must be a canine ; its apex, also, shows a mark in the old skull. 

 Behind this are two teeth differing considerably in size, but of 

 a similar type, which is quite different from those that succeed 

 them. These two, I take to be the premolars. The anterior and 

 smaller, with its characteristics less well shown, has the anterior 

 part of its crown elevated into a small but distinct cusp, from 

 which the contour of the crown slopes upwards and backwards to 

 its posterior border, where there is a very slight indication of a 

 posterior cusp ; the surface of the crown between the cusps is 

 slightly concave. The succeeding tooth is about twice the 

 length and breadth of that just described. It is compressed 



