PLATE XXXIII. 



Figs. 42, 43, 44. — Ethmoid — lateral, dorsal and anterior views. 



Fig. 45. — Alisphenoid, outer face. 



Figs. 46, 47, 48. — Sphenotic — outer, posterior and inner views. 



P'lGS. 49, 50, 51, 52. — Parietal and pterotic — lateral, inner, anterior and 

 posterior views. 



