. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. Lesser GHen A Igde 129 remarkable diversity of form and of cell grouping among the lesser green algae. Botryococcus grows in free floating single or compound clusters of little globose green cells, held together in a scanty gelatinous investment. The clusters are suffi- ciently grape-like to have suggested the scientific name. They, contain, when grown, usually 16 or 32 cells each. They are found in the open waters of bog pools, Fig. 50. Miscellaneous green algas (most
. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. Lesser GHen A Igde 129 remarkable diversity of form and of cell grouping among the lesser green algae. Botryococcus grows in free floating single or compound clusters of little globose green cells, held together in a scanty gelatinous investment. The clusters are suffi- ciently grape-like to have suggested the scientific name. They, contain, when grown, usually 16 or 32 cells each. They are found in the open waters of bog pools, Fig. 50. Miscellaneous green algas (mostly after West). a, Botryococcus; b, Ccelaslrum; c, Dictospharium; d, Kirchnerella; e, Selenastrum; f, Ankistrodesmus falcatus; g, Ophiocytium; h, Tetraspora; i, Crucigenia; j, Scenedesmus;, k, Rhicteriella; 2, ,, Ankistrodesmus settgerus; m, Oocystis. and streams, during the warmer part of the season,, being most abundant during the hot days of August. When over-abundant the cells sometimes become filled with a brick-red oil. They occur sparingly in water- bloom. : Dictyosphcerum likewise grows in more or less spheri- cal colonies of globose cells. The cells are connected together by dichotomously branching threads and all are enveloped in a thin spherical mass of mucus. The colonies are free floating and are taken in the plancton of ponds and lakes and often occur in the water-bloom. J. 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 Needham, James G. (James George), 1868-1956; Lloyd, John Thomas, 1884- joint author. Ithaca,N. Y. , The Comstock Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1915
