. The essentials of botany. Botany. 113 BOTANY. Class in. Geeen Slimes {Gyanophyceoe). 229. These are single cells, or chains of cells, usually of a blue-green or hrowiiish-green color, and generally inhab- iting the water. They very commonly form slimy masses or films on the water, or the moist surfaces where they grow. In their decay they emit a putrid odor, and when abundant, as they sometimes are in city water-supplies, are quite troublesome and offensive. 230. The lower Green Slimes are single-celled, as in. B^ I^s. 49. Fig. 48.—Cells of QloBOoapaa in different stages of growth, show
. The essentials of botany. Botany. 113 BOTANY. Class in. Geeen Slimes {Gyanophyceoe). 229. These are single cells, or chains of cells, usually of a blue-green or hrowiiish-green color, and generally inhab- iting the water. They very commonly form slimy masses or films on the water, or the moist surfaces where they grow. In their decay they emit a putrid odor, and when abundant, as they sometimes are in city water-supplies, are quite troublesome and offensive. 230. The lower Green Slimes are single-celled, as in. B^ I^s. 49. Fig. 48.—Cells of QloBOoapaa in different stages of growth, showing division and the mode in which the daughter-cells are -surrounded and enclosed by the gelatinous walls of the mother-cells, ^.youngest; .E, oldest stage. Magnified Fio. 49.—^, filament of Nostoc; B, end of filament of Osoillaria. Magnified 300 tunes. Chroococcus, Gloeocapsa (Fig. 48), and other genera. Each cell divides into two, and these soon divide again, and so on. In Gloeocapsa the cell-wall is much swollen into a jelly-like mass. 231. In the Nostocs and their near relatives (Osoillaria) there is a little coherence of the cells into chains or fila- ments. The cells form by fission, but after formation adhere somewhat to each other. The Nostocs (Fig. 49, A) occur in water or on moist ground as Jelly-like masses of. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt and company, ;
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