. Fresh-water biology. Freshwater biology. Cells elongated, fusiform, gelatinous sub- stance dense, often lamellate. Fig. 173. Elakatothrix viridis Wille. X 575. (Original.) 131 (90, 95, 175) Cells without a thick gelatinous envelop holding them together; sometimes adhering to each other after di- vision 132 132 (137, 15s, 174) Reproduction by fission only, or rarely by fission and internal division. Family Pleurococcaceae . 133 133 (i34) 135; 136) Reproduction by fission in one direction only, forming equal cylindrical cells, the length being one and one-half to three times the breadth Sticho
. Fresh-water biology. Freshwater biology. Cells elongated, fusiform, gelatinous sub- stance dense, often lamellate. Fig. 173. Elakatothrix viridis Wille. X 575. (Original.) 131 (90, 95, 175) Cells without a thick gelatinous envelop holding them together; sometimes adhering to each other after di- vision 132 132 (137, 15s, 174) Reproduction by fission only, or rarely by fission and internal division. Family Pleurococcaceae . 133 133 (i34) 135; 136) Reproduction by fission in one direction only, forming equal cylindrical cells, the length being one and one-half to three times the breadth Stichococcus Nageli. so i3Sj 136) Reproduction by division in three directions. Cells spherical or, if in small complexes, somewhat angled. Pleurococcus Meneghini. Cells either single or in small clusters of two, four, or more cells which later t, ^ fall apart. Chromatophore a thin lining to the membrane with an opening on ( S one side, and with or without a pyrenoid. t I Pleurococcus is the chief constituent of the green coating on the bark of trees, ^ •* _ ' old wood, and stones. Fig. 175. Pleurococcus vulgaris Meneghini. X 560. (Origioal.). 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
