70 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



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Fig. 12. Diatom Plankton, consisting Fig. 13. Peridinian Plankton consisting 

 mainly of Coscinodiscus and Biddulphia. mainly of Ceratium tripos. 



' 



Fig. 14. Copepod Plankton, consisting Fig. 15. Copepod Plankton, consisting 

 wholly of Calanus helgolandicUs. mainly of Acartia discaudata. One 



Temora is seen. 



