62 



MR. D. M. S. WATSON ON THE 



planted. The four iiicisoi-s, though powerful, are not so dispro- 

 portionately large as they are in earlier Gorgonopsids. 



The palate of Arctognathus is very well-preserved, but its 

 anterior end and two strips along the maxilke are concealed by 

 unremoved matrix and by the lower jaw. 



The basioccipital is broken ofl' through the vagal foramen, 

 whei"e it is thin and not very wide. The posterior part of the 



Text-figure 19. 



Arctognatlius curvimola (Owen). Type-skull. 



Tlio palate, X f. Stippled area covered by matrix and the lower jaw. 

 Parts in dotted lines hypotlietical. 



A A, direction of the section of '^ Lycosaurus tigrimis" text-iig. 20. 



St., stapes. 



basisphenoid forms a, triangular area with raised lateral margins, 

 representing the tubera of earlier forms. Above the edges the 

 sides of the'bone are flat and vertical, posteriorly they terminate 

 in the region of the fenestras ovales, these openings being con- 

 cealed by the foot of the stapes. Anteriorly these vertical sides 

 of the basisphenoid approach together until they are only 



