South African Fossil Reptiles and Amphibia. 163 



of description. In general outline it resembles closely Eocyclops 

 lonyus and Eocyclops magnus, as also iu the very large size of the 

 temporal openings. From the former it differs in having a broader 

 intertemporal region, due to the fact that the postorbitals are not so 

 close together, a large portion of the parietals showing between them. 

 From the latter form it differs in having a relatively shorter autorbital 

 portion, and in the fact that the parietal bar is much wider and is not 

 provided with a crest. 



The chief measurements are as follows : 



Greatest length . ... 502 mm. 



Greatest breadth . . . 406 ,, 



Interorbital widlh .... 105 ,, 



Intel-temporal width . 69 ,, 



Snout to front of orbit . . . . 150 ,, 



Basal length . . . 406 



The nostril is very large, the interuasal width rather small. The 

 snout is fairly long and narrow, and is abruptly truncated anteriorly. 

 Above the nostril is a small nasal boss. 



There is no septomaxilla seen on the surface. As usual the maxilla 

 forms most of the cheek, and, as in E. longus, passes back to below 

 the back of the orbit, being separated for some distance from the 

 jugal by an anterior prolongation of the squamosal. 



The lachrymal is fairly small. The lachrymal foramen is well seen 

 within the orbit. 



The prefrontal is large, almost reaching the back of the nostril and 

 passing well on to the top of the skull. It is strongly thickened in the- 

 supraorbital region. 



The nasals are not separated by the frontals, the anterior boundary 

 of the latter running straight across the skull at the plane of the front 

 of the orbit. The frontal forms the whole of the upper border of the 

 orbit and has a backwardly directed process by the side of the pineal 

 boss. In front of that boss each frontal is somewhat excavated. The 

 whole interorbital region is slightly concave. 



The orbits are large and distinctly triangular, looking mainly 

 forwards and outwards. 



The postfrontal is not well defined, but it was doubtless as in E. 

 longus. The postorbital is large, forming the whole of the postorbital 

 bar, articulating at its outer end wholly with the jugal. 



The relations of the preparietal and parietals have already been 

 discussed. Behind the parietals is the interparietal, whose anterior 

 end is split up by an intrusion of the parietals. The bone appears 

 partly on top of the skull and partly on the occipital plate, the 



