South African Fossil Reptiles and Amphibia. 149 



A skull (S.A. Mus. Cat. No. 2364) from Dunedin, Beaufort West 

 (Cistecephalus zone) agrees with the type except in being somewhat 

 smaller. The bones of the top of the skull are beautifully displayed. 

 Here, as in D. halli, the quadrates are near together. The occipital 

 coiidyle is small, but is feebly tripartite in character. The occipital 

 plate is vertical. The right stapes is showing, resting medially in the 

 foramen ovalis, which looks outwards and downwards. 



Type. Skull in the American Museum of Natural History. 



Locality. Kuil's Poort, Beaufort West, C.P. 



Horizon. Lower Beaufort Beds. (Cistecephalws zone.) 



DlCYNODON PLATYCEPS, Br. 



1913. Broom. Bull. Amer. Mus. Nat. Hist., xxxii, p. 444; fig. 4. 



1914. Broom. Phil. Trans. B 206, p. 44 ; pi. v, figs. 46, 47, 48. 



1915. Broom. Bull. Amer. Mus. Nat. Hist., xxv, 2, p. 138; fig. 27. 



Skull and skeleton of medium size. Skull flattened, considerably 

 longer than broad. Orbits look upwards and outwards. Tusks 

 feeble. Frontal region hollowed, supraorbital margins elevated. Large 

 preparietal forms anterior border of large pineal foramen. Postfrontal 

 long and narrow. 



Type in American Museum of Natural History. 



Locality. New Bethesda, Graaff Reinet, C.P. 



Horizon. Lower Beaufort Beds. (Cistecephalus zone.) 



DlCYNODON PYGMAEUS, Br. & Htu. 



1917. Broom & Haughtou. Ann. S.A. Mus., xii, 5, p. 123 ; fig. 23. 



Three skulls in the South African Museum collection can be defi- 

 nitely assigned to this species. They are : 



Cat. No. 2664. Type from Dunedin, Beaufort West, C.P. ; 



Cat. No. 2668 from the same locality ; and 



Cat. No. 3352 from Highlands, top of Nieuweveld, Beaufort West, 



CP. 

 All are from the Cislecephalus zone. 



The three skulls are almost of the same size ; but it is probable 

 that the type has been flattened by vertical crushing, so that the 

 width given in the oi'iginal description is greater than the skull 

 actually had in life. The maximum width was probably between 

 40 and 45 mm., and the orbit looked at least as much laterally as 

 upwards. The orbit is round, and the postorbital arch rather weak. 

 The skull from Highlands is tusked ; the others are females. The 



