(63) 



EXPLANATION OF PLATES. 



PLATE VIII. 



1. TREMATOSAURUS SOBEYI, sp. n. 



PI6. 



1. Top view of skull, x ^ nearly. 



2. Diagram showing arrangement of bones of top of skull, x J nearly. 



PLATE IX. 



2. TREMATOSAURUS SOBEYI, sp. n. 



1. Palatal view of skull. c J nearly. 



2. Diagram showing arrangement of bones and teeth of palate. c J nearly. 



PLATE X. 



STRUTHIOCEPHALUS WHAITSI, g. et sp. n. 



1. Side view of skull. : |. 



2. Palatal view of skull. X { 



3. Top view of skull. X 5. 



PLATE XI. 



1. Top view of skull of Dicynodon mmtonis, sp. n. x J. 



2. Diagram showing arrangement of bones round pineal foramen in Dicynodon 



breviceps, sp. n. x 1. 



3. Top view of skull of Lystrosaurus oviceps, sp. n. x T 7 ^. 



4. Side view of skull of Lystrosaurus oviceps, sp. n. x . 



EXPLANATION OF LETTEEING. 



P., Frontal; I.F., Interfrontal ; J., Jugal ; L., Lachrymal; MX., Maxilla; N., 

 Nasal; P., Parietal ; Pal., Palatine ; Pa.S., Parasphenoid ; P. for., Pineal foramen ; 

 Pmx., Premaxilla; Po.F., Postfrontal; Po.O., Postorbital ; Po.P., Postparietal ; 

 Pp., Preparietal ; Pr.F., Prefrontal ; Pt., Pterygoid ; P.Vo. , Prevomer ; Q., 

 Quadrate; Q.J., Quadratojugal ; Smx., Septomaxilla ; Sq., Squamosal ; S.Sq., 

 Suprasquamosal ; Tab., Tabulare ; T.P., Transpalatine. 



