. The algae. Algae. 288 THE ALGAE being very delicate or more frequently absent. The apical cell is sometimes provided with a cap or calyptra. The name comes from the rhythmic motion of the threads which results in slow forward progression (cf p. 281). There are a number of very common species which occur in a wide range of habitats. Oscillatoriaceae: Lyngbya (after H. C. Lyngbye, a Danish algo- logist). Fig. 168 This genus differs from Oscillatoria in the presence of a sheath of variable thickness and colour, the character of which is largely dependent upon the environment. The plants are eit
. The algae. Algae. 288 THE ALGAE being very delicate or more frequently absent. The apical cell is sometimes provided with a cap or calyptra. The name comes from the rhythmic motion of the threads which results in slow forward progression (cf p. 281). There are a number of very common species which occur in a wide range of habitats. Oscillatoriaceae: Lyngbya (after H. C. Lyngbye, a Danish algo- logist). Fig. 168 This genus differs from Oscillatoria in the presence of a sheath of variable thickness and colour, the character of which is largely dependent upon the environment. The plants are either attached or free floating, and are often aggregated into a mucous blue-green mat on the soil. When the hormogones escape from the sheath it is almost impossible to determine whether they belong to this or other allied genera. The species occur in the same types of habitat as Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
