872 DB. R. BROOM ON 



Dicynodon at present, but there seems little doubt they represent, 

 if not a distinct genus, at least a subgenus. The more note- 

 worthy characters are the wide parietal region with large 

 parietals, slender postorbital arch, and feeble beak. 



The length of the skull is probably about 45 mm., and the 

 greatest breadth about 30 mm. The orbit measures 12 mm. in 

 diameter. The intertemporal region is 14 mm. across. 



The beak is in very imperfect condition, and little can be made 

 out with certainty as to its structure. It may be stated with 

 confidence that it was short. 



The frontals are large, and form an interorbital region 10 mm. 

 wide. From near the supraorbital margin to the anterior end of 

 the parietal there runs backwards and slightly inwards a shallow 

 groove. There is a moderate sized triangular postfrontal and 

 a large median preparietal. This latter seems to lie entirely in 

 front of the pineal foramen. The parietals are large and form 

 the greater part of the broad intertemporal region. The post- 

 orbital is long and slender. It forms a feeble postorbital arch 

 and the inner margin of the temporal fossa. The squamosal is of 

 the typical Anomodont type. Its zygomatic position extends 

 forwards to below the orbit. The articular region is badly 

 preserved. 



The lower jaw is very like that of Oudenodon, but the beak 

 portion is small, and probably little more than the symphyseal 

 region was covered with horn. 



Suborder Cynodontia. 



IcTiDOPSis ELEC4ANS, gen. et sp. n. (PI. XCIII. fig. 22.) 



This new genus and species is founded on a nearly perfect little 

 skull obtained at Harrismith, Orange River Colony. It is a very 

 near ally of JSfythoscmrus larvatus Owen, but is much smaller, and 

 differs in the number of molars and in othei- cranial characters. 



In general shape the skull agrees fairly well with Nythosaurus. 

 The orbit is near the middle of the skull and relatively larger than 

 in the better known genus, while the jugal aich is more slender. 

 In Ictidopsis the snout is shorter, and the molars are 6 in number 

 instead of 7. 



The greatest length of the skull is probably 63 mm. and the 

 width is 42 mm. The interorbital Avidth is 12'5 mm. 



The premaxillary bone is badly presei-ved, but it is manifest that 

 there are four incisors. The first three incisors are moderately 

 round, but the last is more flattened. There do not appear to 

 be any posterior serrations. 



The maxillary is relatively shorter than in Nythosmirus, and 

 deeper. Above the canine, and in front of the lachrymal are 

 little elevations of the bone. On the canine elevated area are 

 three small foramina and near the root of the 3rd molar two other 



