tlie Skull of Diademodon. 



299 



The outer end of the process is expanded and strongly 

 united with the squamosal by a wide (flat ?) face ; on the 

 back of the skull it is also touched by a descending plate 

 from the parietal, which passes down on the inner side of the 

 squamosal behind and outside the small post-temporal fossa 



Fig. 7. 



Fio-. 3. 



---^^^ExAIlM. 



Fio-. 3, — Diademodon hrutaii, R. 3587. X 1. From below. References 



as in fiys. 1 and 2, -with, in addition : fjuff., foramen jug-ulare ; 



Par.oc, paroccipital process; Pal, palatine; Qu., quadrate; Vo., 



vomer. 

 Fig. 7. — Diademodon browni, R. 3587. x 1. Right quadrate from in 



front. 



The supra-occipital is not separated from the exoccipitals, 

 but no doubt forms the upper border of the foramen magnum. 

 Articulating with its upper edge by a jagged suture is the 

 interparietal; this, so far as it can be seen, is a thin 

 squamous bone bent along its mid-ventral line and lying 

 wedged in between the posterior flanges of the parietals ; it 

 forms a large area of the median division of the back of the 



