196 Annals of the South African Museum. 



There is an incipient secondary palate. The palatal surface 

 of the maxilla has a groove terminating in a foramen which leads 

 to a canal passing backwards through the bone. There is also 

 an oval foramen in the palatine just behind its suture with the 

 maxilla. 



The lower jaw is slender and carries 4 or 5 incisors, 1 canine, 

 and 6 molars. The dentary is long but not particularly powerful, 

 and is not furnished with a distinct mentum. A section across 

 the jaw at the level of the back of the orbit shows a splint of bone 

 lying internal to. and separated from, the upper portion of the 

 dentary. This splint is probably the coronoid. The hinder 

 portion of the jaw is very reduced in depth and length. The 

 angular and surangular can be seen, but their relations are not 

 determinable. 



The form is closely allied to Scaloposaurus and Ictidognathus, 

 and may be safely placed in the Scaloposauridae. This family 

 shows some affinities with the Bauridae, agreeing in the following 

 characters : 



1. The short temporal region. 



2. The nostril directed more forward than outward. 



3. The frontal forming part of the orbital margin. 



4. The small squamosal. 



5. The interpterygoid vacuity. 



(i. The great distance between the posterior ramus of the 

 pterygoid and the paroccipitul process. 



7. The suborbital vacuity. 



8. The absence of the long narrow pterygoid-basisphenoid 



median bar. 



9. The presence of a quadrate ramus of the pterygoid. 

 10. The feeble postorbital arch. 



Features 3, 5, 7, and 9 are common also in the lower Therocephalia. 

 It differs from the Bauridae in : 



1. The nasal being slightly widened posteriorly. 



2. The nature of the molar teeth. 



3. The larger size of the interpterygoid vacuity, and the 



consequent great reduction of the basisphenoidal keel. 



In the latter feature the Scaloposauridae differ more from the 

 Therocephalia than do the Bauridae ; but in the nature of the 

 molars they approximate to the Therocephalia. 



Type. Skull and lower jaw (S.A. Mus. Cat. No. 4021). 



Locality. Zuurpoort, Graaff-Reinet District, C.P. 



Horizon. Lower Beaufort Beds (Cistecephalns zone). 



