Kofoid. — New Species of Diuoiiagellatea. 



PLATE 3. 



Fig. 17. Ceratium lanceolatum, sp. nov., ventral view. X 935. 



Fig. 18. Ceratium schroteri Schroder, view of dextral face. X 315. 



Fig. 19. Ventral view of the same. X 315. 



Fig. 20. Ceratium tricarinatum, sp. nov., dorsal view. X 210. 



Fig. 21. Ceratium pacificum Schroder, dorsal view. X 285. 



Fig. 22. Ceratium bigelowi, sp. nov., dorsal view. X 100. 



Fig. 23. Ceratium scapiforme, sp. nov., dorsal view. X 205. 



