516 



Mr. D. M. S. Watson oh the Cynodontia. 



passage. With its fellow it fonn^ a process wliicli splits the 

 hinder end of the vomer into two, whilst more laterally it 

 separates the palatine and vomer. 



The ectopterygoid is a bone of medium size lying on the 

 front of the root of the })terygoidal flange. 



Fiff. 7. 



n5q. Tab. I.FKr. Qu Qui 



Thrinaxodon liorhinus, Seeley. Occiput of a young individual, X 1. 



There is a secondary i)alate. 



The stapes, preserved in R. 511, is a short powerful bone 

 with a foramen passing through it. 



The dentition is i. 4, e. 1, m. Q>, the last tooth cutting late 

 in life. 



Fio-. 8. 



Mx. Nfl. 6.Mx. 



Thrinaxodo7i liorhimis, Seeley, Snout, to show the septo-maxillary, x 1. 



The lower jaw has been described by Broom. There is a 

 medium-sized reflected himiiia rising from the angular at its 

 point of articulation with the dentary. 



