Investigations in South African Fossil Rcptilia and Amphibia. 85 



and maxilla have the normal Gorgonopsian relationships. The 

 septomaxilla is large, and has the inwardly directed turbinal process 

 dividing the nares into upper and lower passages. It forms an 

 appreciable portion of the cheek behind the nostril, and has the 

 usual outer foramen between it and the maxilla. The nostrils are 

 nearly terminal. 



The maxilla is large, forming nearly three-quarters of the cheek, 

 and having a sub-orbital portion supporting the jugal. 



The dental formula is i5 cl ?u4. Most of the teeth are missing, 

 only the fourth incisor on either side being present, but the sockets 

 are plainly visible. The incisors are large, nearly equal in size to 

 one another, and closely set together, the five teeth occupying a 

 space of 54 mm. at the edge of the bone. At that level the 

 4th incisor has an antero-posterior diameter of 11 mm The roots 

 of the teeth are long and simple. Each tooth is implanted in a 

 separate socket. Behind the last incisor is a diastema of 14 mm., 

 and then comes the socket of a massive canine 28 mm. in diameter. 

 Directly behind the canine is a series of four molars all lost 

 gradually decreasing in size, and occupying together a space of 

 33 mm. 



The nasals are very large, forming the top of the snout, and 

 having posterior projections which separate in part the f rentals from 

 the prefrontals. 



The prefrontal is large, forming the upper anterior quadrant of 

 the orbital border. The frontal is largely shut out from the orbital 

 border, but it forms 13 mm. of it between the prefrontal and post- 

 frontal. It passes forward, separating the posterior parts of the 

 nasals. 



The orbit is small, looking forwards and outwards and possibly 

 slightly upwards, and lies wholly in the posterior half of the skull. 

 The postfrontal is large, forming nearly one-fourth of the orbital 

 margin, and articulating apparently with the parietal to behind the 

 pineal foramen. 



The temporal fossa is slightly larger than the orbit. The inter- 

 temporal region is wide, and the pineal foramen is placed back 

 almost as far as the occipital crest. The preparietal is small, and 

 wholly in advance of the pineal foramen. 



The squamosal forms the lower and most of the posterior borders 

 of the temporal fossa and the outer sides of the occipital plate. The 

 lower part of the bone and the quadrate region are missing. 



The occipital plate is broader than high, and vertical. The 

 interparietal is slightly broader than deep, and forms a large part 



