PLATE XIV. 



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Fig. 1. — Plankton, consisting almost 

 wholly of Noctiluca scintillans. 



Fig. 2. — The Luminescent Dinoflagel- 

 late Ceratium tripos. 





Fig. 3. — Copepoda {Pseud ocalanus elongatus) from the surface-net. 



All magnified. 



[Photo-micrographs by A. Scott. 



