South African Fossil Reptiles and Amphibia. 141 



The orbit is wholly in the anterior half of the skull. The nostrils 

 are large ; within the nostril can be seen a large septomaxilla which 

 does not appear on the face. 



The postorbitals almost meet one another on the parietal bar,, 

 forming a marked parietal crest. In front of the crest is a small oval 

 pineal foramen, lying somewhat in a hollow, and not raised on a boss 

 of bone as in Eocyclops lonijus. In front of the pineal foramen, and 

 forming its anterior border, is a small preparietal, lozenge-shaped. 

 The iuterfrontal suture is seen along a median ridge, which terminates 

 somewhat in front of the pineal foramen. The postfroutal was a 

 narrow, inconspicuous bone lying for a short distance between the 

 postorbitals and the frontals. 



The occipital plate is very broad, and the condyle is comparatively 

 small. As far as can be seen, the structure is typically Dicynodont. 

 The foramen magnum is very small compared with the size of the 

 plate. 



The palate is long and narrow, the premaxilla furnished with two- 

 ridges, separated by a median hollow. The distance between the 

 caninifonn processes, which are placed below the front of the orbit, is 

 101 mm. The pterygoids are strong, the minimum width across them 

 being 43 mm. 



The lower jaw is complete, and in good condition. The length from 

 the beak to the back of the articular is 455 mm., while the greatest 

 depth of the dentary is 110 mm. The front of the jaw is narrow, and 

 has an upwardly directed beak which fits into the front of the palate. 

 At a distance of 110 mm. behind the beak the rami begin to separate 

 more rapidly, and the distance between the outer sides of the articulars 

 is 280 mm. The front of the jaw is prow-shaped, inclined at an angle 

 of about 45 to the plane of the upper edges of the dentary. 



The dentary is the largest bone und has a deep symphysis. The 

 spleuial is large, and forms more than half of the inner side of the 

 front half of the jaw and enters largely into the symphysis. Its upper 

 process lies on the prearticular, while the lower process is wedged 

 between the prearticular and the angular. The angular is not very 

 large. An anterior process passes between the dentary and splenial 

 almost to the symphysis. On the lower border of the jaw the plate- 

 like angular forms an overhanging, projecting flange. The pre- 

 articular, surangular, and articular are typically Anomodont. 



Type. Skull and lower jaw. (S.A. Mus. Cat. No. 2679.) 



Locality. Dunedin, Beaufort West, C.P. 



Horizon. Lower Beaufort Beds. (Cistecephalus zone.) 



