. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . a peristaltic manner, or (2) the plant has some propelling organs such asflagella, cilia or pseudopodia, that either act upon the solid substratumor move freely through the water. One must agree with Phillips thatthe first of these possible explanations is quite inadequate to account forall the movements exhibited by the Oscillatoriacea?. The second hypothesisis, however, at present unsupported by sufficient testimony for it to beaccepted wit
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . a peristaltic manner, or (2) the plant has some propelling organs such asflagella, cilia or pseudopodia, that either act upon the solid substratumor move freely through the water. One must agree with Phillips thatthe first of these possible explanations is quite inadequate to account forall the movements exhibited by the Oscillatoriacea?. The second hypothesisis, however, at present unsupported by sufficient testimony for it to beaccepted with any degree of confidence. In certain species of Oscillatoria and Phormidium there have been described fine hair-like outgrowths fromthe terminal cells (see fig. 14). Thesehave been regarded by many observersas parasitic or saprophytic Bacteria ofthe nature of Opliiotlirix, but Phillips(04, p. 320) asserts that those out-growths observed by him were livingportions of the algal filament whichhad grown out from the was unable to assign a definitefunction to these outgrowths, which hestates at first stain like the protoplasmof the
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