454 Annals of the Soul it African Museum. 



together, 85 mm. The nasal forms the upper, posterior and to a 

 slight extent inferior borders of the nostril. 



The maxillary bone is moderately complete on the left side, but 

 on the right side only the posterior half remains That on the right 

 side, however, though imperfect is scarcely at all crushed. The 

 most striking characteristic of the maxillary is the presence on the 

 outer side of a well-developed ridge. This is directed outwards and 

 slightly downwards from the lower border of the outer surface. The 

 edge is rounded and presents a rough surface with a number of 

 transverse grooves. It seems probable that this ridge may have 

 supported a heavy upper lip, but it could hardly have been sheathed 

 in horn. There is a very feebly developed ridge found in a similar 

 situation in some of the more normal Dicynodonts. In the type of 

 Oudenodon prognathus, Owen, there is a fairly well-marked ridge 

 present, but not quite in the same situation. The tusk is directed 

 more forwards than downwards, and lies almost directly in a line 

 with the malar arch. It is more feebly developed than in the 

 majority of species of Dicynodon, and gives the maxilla more the 

 appearance of that found in Gordonia. At the anterior part where 

 the tusk is free it measures 13 mm. in greatest diameter. The root 

 of the tusk as displayed at the fracture on the right side measures 

 from 18-20 mm. Judging from the preserved parts the portion of 

 the palate between the maxillaries must have been narrow, and it is 

 probable that the beak was slender. The width of the upper jaw at 

 the posterior part of the lateral ridge is 104 mm. It will thus be 

 seen that the greatest breadth of the jaw is but little greater than 

 the least measurement across the frontals, and less than the 

 maximum frontal breadth a condition in very marked contrast 

 to that found in Dicynodon simocephalus, Weit. 



The premaxillary is completely lost on the right side, but sufficient 

 remains on the left side to give a fair idea of the position of the point 

 of the beak. 



The malar bone is fairly well preserved on the left side but some- 

 what crushed. The portion forming the arch is long, slender, and 

 straight. It is hollowed on the outer side apparently for the articu- 

 lation of the post-orbital and the squamosal. 



The greater portion of the zygomatic part of the squamosal is 

 preserved though much crushed. The descending portion of the 

 squamosal, though its outer edge is much broken, is moderately 

 well shown. In its relations to the occiput it quite agrees with the 

 condition in other species of Dicynodon. 



About half the quadrate is preserved, though the articular surface 



