SOUTH AFKICAN THEROCEPHALIAN REPTILES. 



345 



an irregular transverse sutui'e, and posteriorly with the parietals 

 by a transverse serra,ted suture. 



There is no postfrontah 



Tlie postorbital is relatively small, forming the posterior half 

 of the upper orbital margin and the upper half of the postorbital 

 arch. It extends backwards by the side of the parietal to the 

 plane of the posterior border of the pineal foramen. 



The parietals are relatively long and slender. In front they 

 are flattened out, and form a transverse suture with the frontals. 

 Posteriorly they form a sharp intertemporal crest, and at the 

 front of the crest is a large oval pineal foramen. From the 



Text-fio-ure 2. 



Upper surface of skull of Ictidoswclnis longiceps Broom. 



posterior part of the crest the parietals pass outwards, forming a 

 considerable part of the occipital crest. 



The occiput is very imperfectly preserved. It is shallow and 

 broad, and from the upper margin of the foramen magnum the 

 bone passes upwards a,nd forwards. The elements cannot be 

 clearly made out, though they are doubtless as in better-known 

 Therocephalians. The squamosals and quadrates are lost. 



As already stated, the palate has not been fully cleared in front 

 as the matrix is required to support the teeth, but the structure 

 is sufliciently revealed in all the posterior part. A transverse 

 fracture through about the plane of the third last molar shows in 

 section the prevomers. Though very closely placed to each other 



