870 DR. R. BROOM OX 



species. The nasals are so narrow that the nostrils look almost 

 directly upwards. The upper part of the nasals is thickened, 

 and the prefrontal region of the orbital margin is also elevated. 

 The frontal region is broad and flat. The parietal foramen is 

 situated in an elevated pjeparietal. The postorbitals approach 

 each other behind the foramen and neai'ly touch, forming a 

 parietal ridge. The tusk is small and directed forwards and 

 downwards. The lower jaw has the fiont portion unusually 

 broad and deep. The foramen behind the dentary is very 

 small. 



The whole skeleton from the snout to the end of the tail 

 probably measures 500 mm. ; the humerus measures 50 mm. and 

 the femur 58 mm. 



DiCYNODON LUTEICEPS, sp. n. (PL XCII. figs. 14-16.) 



The type of this new species is an imperfect skull found by me 

 at Kuilspoort, Beaufort West distrfct. The skull has lost the tip 

 of the beak, the postorbital and zygomatic arches, and there is 

 about 20 mm. missing from the postpterygoid and from the 

 parietal region so that the contact between the occipital and 

 anterior portions of the skull is lost, but otherwise the skvill is 

 complete. 



The most noteworthy characters of the type are the relative 

 shortness of the beak, the broad concave frontal region, and the 

 broad flattened intertemporal region, the upper surface of which 

 is almost entirely formed by the postorbitals. In a maxillary 

 from the same locality, and believed to be of the same species, the 

 tusk is feeble and directed downwards and slightly forwards. 



The greatest length of the skull from the snout to the back of 

 the sqviamosal is about 195 mm., and the greatest width across the 

 squamosals is 145 mm. From the front of the beak to the orbit 

 is probably aboiat 48 mm., and the antero-posterior diameter of 

 the orbit is about 43 mm. The interorbital width is 35 mm., and 

 the intertemporal region 29 mm. 



The type specimen is tuskless. The caniniform process is 

 directed downwards and forwards and has a marked low outer 

 ridge which passes iipwards towards the jugal arch. Below the 

 nostril is an anterior ridge parallel to the other and forming a 

 well-marked valley between the two. The nostril is fairly large 

 and the nasal is considerably thickened above it, forming an 

 overhanging supranasal ridge. 



The prefrontals are small, but the frontals are well developed. 

 Posteriorly they enclose between them the small preparietal and 

 meet the anterior ends of the parietals. The postfrontals are 

 long and narrow. The preparietal is small and seems to lie 

 entirely in front of the pineal foramen. The postorbitals are 

 very large where they overlap the parietals, but the postorbital 

 arch is unusually feeble. 



The parietals are large and powerful, but are almost completely 



