. Fresh-water biology. Freshwater biology. 123 (122) Chromatophores many, parietal Chlorobotrys Bohlin. Cells spherical, in a gelatinous matrix, as in SphaerocysHs, but the chlorophyll in many parietal discs. Fig. 168. Chlorobotrys regularis Bohlin. X 300. (After West.) 124 (121) Cells not spherical 125 125 (126) Cells crescent-shaped Kirchneriella Schmidle. Cells in' clusters, as in SphaerocysHs, but strongly crescent-shaped. In reproduction internal division takes place trans- versely and the four or eight daughter cells are set free by the breaking of the cell wall. Several species occur in
. Fresh-water biology. Freshwater biology. 123 (122) Chromatophores many, parietal Chlorobotrys Bohlin. Cells spherical, in a gelatinous matrix, as in SphaerocysHs, but the chlorophyll in many parietal discs. Fig. 168. Chlorobotrys regularis Bohlin. X 300. (After West.) 124 (121) Cells not spherical 125 125 (126) Cells crescent-shaped Kirchneriella Schmidle. Cells in' clusters, as in SphaerocysHs, but strongly crescent-shaped. In reproduction internal division takes place trans- versely and the four or eight daughter cells are set free by the breaking of the cell wall. Several species occur in the plankton. They also occur in ponds among water Fig. 169. Kirchneriella obesa Schmidle. (Original.) X 600. 126 (125) Cells oval or bluntly pointed Oocystis Nageli. Cells oblong, single, or two, four, or eight in a gelatinous envelop; in some cases many clusters in a colorless gelatinous matrix. Chromatophore single, parietal, with an opening on one side, or of many small discs. Pyrenoids present in some species. Cells- single or in clusters, as in SphaerocysHs, but ellipsoidal in shape. OocysHs is frequently found in the plankton where It is usually in large gelatinous colonies similar to SphaerocysHs and Kirchneriella. In other localities the cells are generally solitary. Fio. 170. Oocystis solitaria Wittrock. X 600. (Original.). 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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