Investigations in South African Fossil Reptilia and Amphibia. 79 



The maxilla is a large bone forming the lower border of the nostril 

 and apparently passing back to form part of the sub-orbital arcade. 

 It carried probably 6 or 7 teeth, of which only one or two are 

 preserved. The posterior teeth are smaller than the anterior. The 

 first may have functioned as a canine, being apparently bluntly 

 pointed, but it was certainly comparatively much smaller than the 

 canine of Titanosuchus. 



The facial part of the septomaxilla is small, forming part of the 

 posterior wall of the nostril and separating the maxilla and nasal 

 for a short distance. 



The nasals form a well-marked upstanding ridge between the 

 nostrils and orbits along the centre of the skull, a region well 

 marked off from the cheeks, which slope at an angle of about 50 

 from the jaws and are concave directly in front of the orbits. This 

 nasal ridge is wide in its posterior part, suddenly narrows, and then 

 has a uniform width of about 30 mm. throughout the anterior 

 two-thirds of its length. 



The orbit lies wholly within the posterior half of the skull, is 

 longer than high, and shows very little supraorbital thickening. 

 The prefrontal forms the anterior upper quadrant of the orbital 

 margin, but its front margin is not well delineated. 



The lachrymal is smaller than the prefrontal and does not reach 

 the septomaxillary. 



The interorbital area has a width of nearly 80 mm. It is flat, 

 formed mostly by the frontals, which form a small part of the 

 superior borders of the orbits. 



The postorbital bar is comparatively .weak, but the postorbitals 

 pass back to form a large part of the upper border of the temporal 

 fossa. The parietals are not distinguishable, but they must have 

 been small. 



The pineal foramen is sub-circular in shape and very large, having 

 a longer diameter of 26 '5 mm. The parietal region surrounding it 

 was raised slightly above the level of the frontals. The foramen is 

 placed very far back, in the plane of the back of the temporal 

 fossa. 



The squamosal, quadrato-jugal, and jugal occupy apparently the 

 same relations as in Moschops and Delphinognathus, but there is no 

 foramen between the jugal and quadrato-jugal such as occurs in 

 Delphinognathus. The quadrate is scarcely seen from the side of the 

 skull. It is pushed forward by the large squamosal to the level of 

 the middle of the orbit. From behind it is roughly boot- shaped 

 with the "heel" internal and the "toe" pointing outwards and 



