672 , MR. R. BROOM ON ANOMODONT REPTILES 



This little Anomodont, to which I have given the name 

 Emyduranits platyops, shows some afl&nities with Cryptocynodon 

 shnus Seeley, and also with Prodicynodon pearstunensis Broom, 

 but must be regarded as the representative of a very distinct 

 genus. 



Endothiodon crassus, sp. n. (Text-fig. 45.) 



This new species is founded on a beautiful skull discovered by 

 me at Dunedin, Beaufort West district. The skull has lost the 

 lower jaw, and has the parietal region badly weathered and the 

 squamosal portion of the left temporal arch imperfect, but other- 

 wise it is almost complete. With the exception of Endothiodon 

 whaitsi it is the largest Endothiodon skull known, a.nd it is little 

 inferior to that other, though very difFerentin shape. 



Unlike Endothiodon uniseries Owen and Endothiodon whaitsi 

 Broom, it is veiy broad and flat, and the parietal region is only 

 slightly elevated above the frontal plane. In general shape and 

 proportions the species which it most resembles is Endothiodon 

 paucidens Broom, but that it is very diflferent from this species 

 will be at once evident on comparing the figures. 



The premaxilla when viewed from the front is like a thick 

 inverted V, the deep notch being for the point of the mandible, 

 and the two points are the caniniform processes, which here are 

 formed by the premaxilla and not, as in the tuskless Dicynodonts, 

 by the maxillafi. A small knob is situated in front of each 

 nostril. The superior median process passes between the nasals, 

 but is short. 



The nasals are very broad, and the bones, like all the bones of 

 the top of the skull, very thick. They are as broad as long, and 

 the whole preorbital portion of the skull is thus much broader 

 than long — a condition which differentiates this species of Endo- 

 thiodon from ail others. 



The prefrontals are of moderate size, and so thickened that 

 they may be looked upon as forming preorbital bosses. 



As in all typical Endothiodons, there are two longitudinal 

 grooves passing from the front of the frontals down the middle 

 of the nasals to the upper corners of the nostrils. 



The septomaxilla seems to be small and within the nostril, 

 but the evidence is not satisfactory as to whether it also appears 

 on the face. 



The lacrimal is smaller than the prefrontal, but its limits 

 cannot be clearly made out. 



The maxilla is a large bone. As in all species of Endothiodon, 

 it has a long ridge which forms an alveolar border and at a 

 considerable distance further in a row of .teeth. Most of the 

 teeth appear to be lost, but when complete there was probably a 

 single row of eight teeth which measured 74 mm. The first 

 tooth of the series is round in section and has a diameter 

 of 7 mm. ; the last, also round, has a diameter of 8"5 mm. The 

 maxilla forms most of the lateral part of the face, and it sends 



