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Var. marina. Syn. : B. Oerstedtii. A variety of B. alba distinguished from the ordinary kind by its occurrence in sea water, and by its smaller size (thickness only 2u.).

A species found in the waste water from sugar manufactories, tanneries, etc., and in sulphur waters, forming a white or yellowish white layer (the baregine or glairine of the French); in the adult state also found upon decomposing water plants and dead insects. The filaments vary in thickness from 1 to 5 u. They increase by division.