. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . something of a puzzle. The form of its cells, with strong cell-walls, andthe method of formation of the daughter-cells are exactly as in the Chloro-phyceous genus Oocystis. It has a definite nucleus with a nuclear membrane,and fully differentiated chromatophores of a rich blue-green colour (consultfig. 24). In the young cells the chromatophores are numerous and short,but in older cells there are from 10 to 20 of them, mostly curved, andmore o
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . something of a puzzle. The form of its cells, with strong cell-walls, andthe method of formation of the daughter-cells are exactly as in the Chloro-phyceous genus Oocystis. It has a definite nucleus with a nuclear membrane,and fully differentiated chromatophores of a rich blue-green colour (consultfig. 24). In the young cells the chromatophores are numerous and short,but in older cells there are from 10 to 20 of them, mostly curved, andmore or less radiating from the central part of the cell. Glaucocystis Nostochinearum is not uncommon in bogs in Western Europe, and a large form of it has been found in E. Africa. Thereis no doubt that the Alga differs from all theother Blue-green Algse in the possession of ahigher type of protoplast and true chromato-phores, and it was this fact which led to thesuggestion that the Myxophyceoe should beprimarily divided into the Glaucocystidete andthe Archiplastideoe (G. S. W. 04). It is probable,however, that this Alga, notwithstanding itsbrilliant bl
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