PLATE XXX. 



Figs. 12, 13, 14. — Right prootic, inner, anterior and exterior views. 



Fig. 15. — Right opisthotic. 



Figs. 16, 17, 18, 19. — Right supraoccipital, posterior, lateral, dorsal and 

 ventral views. 



Figs. 20, 21, 22, 23. — Basioccipital, posterior, anterior, lateral and ventral 

 views. 



Fig. 24. — Vomer, ventral view. Natural size. 



