Six marine flagellates, used as food in the rearing of the larvae ofOstrea edulisL., are described. One belongs to the Chlorophyceae,Pyramimonas grossiin.sp. (Polyblepharidaceae); four belong to the Chrysophyceae,Chromulina pleiadesn.sp. (Chromulinaceae),Isochrysis galbanan.g., n.sp.,Dicrateria inornatan.g., n.sp.,D. gilvan.g., n.sp. (Isochrysidaceae); and one belongs to the Cryptophyceae,Hemiselmis rufescensn.g., n.sp. (Nephroselmidaceae). A form of reproduction in a palmelloid phase, not previously described, is recorded for the Isochrysidaceae.
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Mary Parke (1949) studied this question.
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