Abstract
Eight spp. of Protozoa possessing blue or blue green chromatophores have been found at one or more stations in the U. S. A. Some of them are common. Proposed are: Cyanomastix (p.494) (Chlamydo-monadidae), with C. morgani* (p.494), Alabama; Chroomonas setoniensis* (p.494) ; Cyanomonas coereu-lus* (p.496), Alabama, Tennessee; Gymnodinium lim-neticum* (p.497), Tennessee.

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