EXPLANATION OF PLATES. 



PLATE XXII. 



Fig. 1. Lateral view of Amphidinium siiJcatum, sp. nov. X 850. 



Fig. 2. Ventral view of same. X 850. 



Fig. 3. Dorsal view of same. X 850. 



Fig. 4. Ventral view of Heterocapsa pacifica, sp. nov. X 1370. 



Fig. 5. Dorsal view of same with cell contents. X 1370. 



ABBEEVIATIONS. 



amy. — amyloid body. 

 chr. — chromatophore. 

 ep. — epitheca. 

 fl.p. — flagellar pore. 



l.f. — longitudinal furrow. 

 n.- — nucleus. 



tr.f. — transverse furrow. 

 vac. — vacuole. 



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