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MARINE DINOFLAGELLATES AND RED WATER CONDITIONS 



Fig. 1. Ceratium trichocews, showing progressive and proportionate reduction 

 of the horns in autotomy. (After Murray and Hjort.) 



Fig. 2. (a) Ornithocercus splendidus; (b) Ornithocercus steinii. (After Murray 

 and Hjort. ) 



providing a maximum surface as resistance to sinking (Kofoid, 1906). 



Thus the dinoflagellates, in contrast to the diatoms, appear to be 



particularly well adapted for life in relatively calm, low-density water. 



In addition, and of perhaps greater significance, the same factor of 



