PLATE XXIV. 



Fig. 10. Ventral view of Ceratium gaUicum, sp. nov. X 313. 



Fig. 11. Dorsal view of same. X 313. 



Fig. 12. Cell contents of same. X 313. 



Fig. 13. Ventral view of Ceratium macroceros deftexum, subsp. nov. X 100. 



Fig. 14. Lateral view of same. X 100. 



Fig. 15. Dorsal view of same. X 100. 



ABBEEVIATIOXS. 



chr. — chromatophores. 

 71. — nucleus. 

 vac. — vacuole. 



[322] 



