South African Fossil Reptiles and Amphibia. 131 



The lower border of the fenestra together with part, at least, of its 

 anterior border is formed by the basioccipital. The posterior border 

 is formed by the paroccipital, which also bounds the foramen jugu- 

 lare. This foramen looks almost directly backwards and is placed at 

 the level of the condyle. The carotid foramina lie together in the 

 pit of the basisphenoid just behind the pterygoids. 



T#pe. Incomplete skull. (S.A. Mus. Cat, No. 640 ) 



Locality. Prince Albert Road Station, C.P. 



Horizon. Lower Beaufort Beds. (Tapinocephalus zone.) 



DICYNODON CORSTOEPHINEI, Br. & Htn. 

 1917. Broom & Haughton. Ann. S.A. Mus., xii, 5, p. 119, fig. 19. 



The occipital condyle in this species is of the tripartite type. The 

 foramen for the exit of the IXth-XIIth nerves looks directly back- 

 wards and is on a level with the uotochordal pit in the condyle. The 

 post-temporal vacuity lies on the occipital plate just above the level 

 of the top of the condyle. 



The basisphenoid tubera lie above the level of the quadrate, so that 

 the feuestra ovalis looks more downwards than outwards. The tubera 

 are not greatly below the level of the condyle and the groove between 

 them is as high as broad. 



Type. Incomplete skull and lower jaw. (S.A. Mus. Cat, No. 

 3337.) 



Locality. Heuning Nest Krantz, G-raaff Eeinet, C.P. 



Horizon. Lower Beaufort Beds. (Top (?) of Endothiodon zone.) 



DICYNODON CYCLOPS, sp. nov. 



The specimen to be described, although somewhat reminiscent of 

 Dicynodon platyeeps and D. lutriceps, seems to differ sufficiently to be 

 classed as a different form. It consists of a skull showing all the 

 sutures of the top, having the following measurements : 



Greatest length . . '225 mm. 



Greatest breadth . . . 145 ,, 



Length from beak to front of orbit 52 ,, 



Antero-posterior diam. of orbit . 44 ,, 



Interorbital width 33 ,, 



Intertemporal width 34 ,, 



Basal length . . . . . . 167 ,, 



In side view the skull agrees with that of D. pardiceps in the 

 concavity at the preparietal region and the convexity of the parietal 



