PEOF. H. G. SEELEY ON DELPHINOGNATHTJS CONOCEPHALUS. 475 



Theriodontia and the Dicynodontia. It is to this sub-order that 

 Delphinognathus may be referred, though it forms a family type 

 distinct from the -Sillurosauridae, distinguished by the conical parietal 

 with a large foramen, the supra-condylar notch, and other modifi- 

 cations of the skull and the teeth. 



I would in conclusion express my grateful thanks to the trustees 

 of the South African Museum, Capetown, for the opportunity of 

 describing this remarkable type. 



