. An elementary course of practical zoology. Zoology. 296 HYDRA CHAl'. Fig. 75.—Hydra. A, a nematocyst contained in its cnidoblast {^nb\ showing its coiled filament and the cnidocil (cnc). B, the same after extrusion of the thread, showing the larger and smaller barbs at the base of the thread ; nu. the nucleus of the cnidoblast. C, a cnidoblast, with its contained neraatocyst, connected with one of the processes of a nerve-cell (nv. c). (From Parker's Biology : after Schneider.) in as a hollow pouch : the free end of the latter is continued into a hollow coiled filament, and from its inner su
. An elementary course of practical zoology. Zoology. 296 HYDRA CHAl'. Fig. 75.—Hydra. A, a nematocyst contained in its cnidoblast {^nb\ showing its coiled filament and the cnidocil (cnc). B, the same after extrusion of the thread, showing the larger and smaller barbs at the base of the thread ; nu. the nucleus of the cnidoblast. C, a cnidoblast, with its contained neraatocyst, connected with one of the processes of a nerve-cell (nv. c). (From Parker's Biology : after Schneider.) in as a hollow pouch : the free end of the latter is continued into a hollow coiled filament, and from its inner surface. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Parker, William Newton, joint author. London, Macmillan and Co. , Limited; New York, The Macmillan Company
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