PLATE 3. 



Fig. 14. OpMocten paciflcum L. & M., partial dorsal view. 



Fig. 15. Partial ventral view of same. 



Fig. 16. Ophiactis arenosa Ltk., partial dorsal view. 



Fig. 17. Partial ventral view of same. 



Pig. 18. Ophiaeantha normani Ly., partial dorsal view. 



Fig. 19. Partial ventral view of same. 



[58] 



