. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. SEARS CROWELL 303 In a day or two in Coidijloplwra and other athecate forms a small bud (sometimes several) appears on the upper side of the cellular ball and quickly develops four or so tentacles. If fed, it will grow. In Campaniihha, a growth zone appears on the ball and produces either a stolon or a pedicel. This grows out for several days using the materials in the ball. Finally, after about a week, in exactly the same sequence as in ordinary hydranth development, a new small but com
. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. SEARS CROWELL 303 In a day or two in Coidijloplwra and other athecate forms a small bud (sometimes several) appears on the upper side of the cellular ball and quickly develops four or so tentacles. If fed, it will grow. In Campaniihha, a growth zone appears on the ball and produces either a stolon or a pedicel. This grows out for several days using the materials in the ball. Finally, after about a week, in exactly the same sequence as in ordinary hydranth development, a new small but complete hydranth is produced. Figure 7 shows sketches of this for Fig. 7. Sketches of the production of hydranths from dissociated tissues of Campanularia. At the top are clumps of cells which have been pushed together. Within a few hours these rearrange themselves into a hollow ball. This ball may produce a hydranth in either of two ways: at the left, by the production of a stolon from which a pedicel and then a hydranth develops; at the right, by the production of a pedicel at the top of which a hydranth develops (From Hartman, ref. 9).. 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 Symposium on the Physiology and Ultrastructure of Hydra and Some Other Coelenterates (1961 : Coral Gables, Fla. ); Lenhoff, Howard M; Loomis, W. Farnsworth (William Farnsworth), 1914-. Coral Gables, Fla. , University of Miami Press
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