. A manual of zoology. 96 MANUAL OF ZOOLOGY SECT. the four-sided mouth {mth). Very commonly as the medusa swims the umbrella becomes turned inside out, the sub-. Fig. 42.— Nematocysts of hydra. A, undischarged; B, discharged; C, nerve- supply; cub, cnidoblast; cnct cnidocil; nn, nucleus; ntc, nematocyst; , nerve-cell. (From Parker's Biology, after Schneider.) umbrella then forming the convex surface, and the manu- brium springing from its apex (Fig. 41, C).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
. A manual of zoology. 96 MANUAL OF ZOOLOGY SECT. the four-sided mouth {mth). Very commonly as the medusa swims the umbrella becomes turned inside out, the sub-. Fig. 42.— Nematocysts of hydra. A, undischarged; B, discharged; C, nerve- supply; cub, cnidoblast; cnct cnidocil; nn, nucleus; ntc, nematocyst; , nerve-cell. (From Parker's Biology, after Schneider.) umbrella then forming the convex surface, and the manu- brium springing from its apex (Fig. 41, C).. 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; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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