512 



Annals of the South African Museum. 



The basioccipital is thin. The basisphenoidal tubera are at least 

 as strong as those of Scymnognathus ichnitsi. The median pterygoid 

 bar is shortened. 



UN-NAM KD HU;M. 



A .somewhat weathered pre-orbital |iortion of a skull, collected 

 high up on the slopes above Oudebrrg Hotel. Graaff Reinet, C. P. 

 (S. A. Mns. Cat. No. 3330 > has been developed to show the features. 



Fig. 



Un-named form. (S. A. M. Cat No. 333n). 

 Palatal view of skull. 



of the palate. It has also been split longitudinally and in several 

 places transversely (at points indicated by the lines A, B, C, in the 

 figure), and most of the structure of the mid-region has thus been 

 elucidated. 



Most of the interchoanal bar is formed of the prevomers whose 

 ventral surface is rounded anteriorly and becomes Hatter and wide 

 posteriorly. In sections A and B the prevomers are fused: but in 

 section C they are separated by a distinct vertical suture. Between 

 them they clasp dorsally a very thin vertical median plate, occupying 

 the same position as the bone called sphenethmoid by Broom in his 



