PLATE XXVI. 



Fig. 22. Ventral view of Ceratium ostenfeldi, sp. nov. X 313. 



Fig. 23. Dorsal view of same. X 313. 



Fig. 24. Ventral view of individual with wide antapieal angle. X 100. 



Fip-. 25. Dorsal view of a second individual. X 100. 



[326] 



