PLATE XXVII. 



Fig. 27. Dorsal view of Ceratium reticulatnm spirale, subsp. nov. X 313. 

 Fig. '28. Dorsal view of another individual with a more completely coiled 



antapical. X 135. 

 Fig. 29. Dorsal view of Ceratium mollis, sp. nov. X 280. 



[328] 



