272 Transactions of the South African Philosophical Society. 



■uniseries, and most likely also belonging to the same individual as 

 the type. 



The specimen which represents the back portion of the skull, on 

 the whole, bears a fairly close resemblance to the corresponding 

 portion of the skull of Dicynodon. 



The occiput is fairly well preserved, though somewhat crushed. 

 The occipital condyle is like that of Endothiodon bathy stoma, exca- 

 vated in the centre. When viewed from behind it is kidney-shaped, 

 and about twice as broad as deep. The under side is flattened by 

 the articular surface passing in below the condyle for a considerable 

 distance. The posterior surface is, except for the deep central 

 excavation, moderately flat. The upper and outer corners are 

 rounded, and the middle portion of the upper side passes backwards 

 as a distinct though small ridge. At the outer side of the base of 

 the condyle is a large foramen as in Dicynodon. Immediately above 

 the foramen is a little rough transverse tubercle for the attachment 

 of some muscle. The foramen magnum is a little higher than broad, 

 and is narrower above than below. At either side of the foramen 

 there is a well-developed rounded tubercle, similarly situated to that 

 in the occiput of Ptychosiagum orientate. The sutures cannot be 

 made out, and the limits of the ex-occipital are therefore uncertain. 

 The portion of occiput above the foramen magnum slopes forward. 

 In the specimen much of the slope is due to crushing, but it is pro- 

 bable that even in the uncrushed condition the slope is considerable. 

 The ex-occipital has a well-developed external process for the support 

 of the squamosal, as in Anomodonts generally. The downward 

 processes of the basi-occipitai are flatter than in the Dicynodonts, 

 but this may be due in part to crushing. In front they are over- 

 lapped by the basisphenoid, as in Dicynodon and Oudenodon. In 

 the middle of the basisphenoid there is a deep pit, but whether it 

 ends blindly or leads into a foramen is not revealed in the specimen. 

 On either side of this median pit is a foramen which is probably the 

 carotic foramen. Outside of this and a little in front is a larger 

 foramen. This region of the Anomodont skull is the only region of 

 which the anatomy is still unknown, and as I expect shortly to be 

 in a position to give a detailed account of the sphenoid region, it 

 will perhaps be better to avoid speculation on one or two points, 

 which may possibly be cleared up by one or two specimens which 

 are being sectioned. The back part of the pterygoids is fairly well 

 preserved. It is chiefly noteworthy from the formation by the united 

 pterygoids behind the oval median pterygoid pit of a prominent 

 but very blunt keel. 

 The lower jaw is represented by the greater part of the left dentary 



