. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 7. Polarity in regeneration. A, B, and C. Thin transverse sections from the upper body region frequently regenerate biapically. D and E. A longi- tudinal quarter of a polyp (hydranth removed) regenerates obliquely, that is, with the hydranth facing upward and also inwards. /• and G. A quarter of a body segment regenerates with the hydranth facing inwards, at right angles to the original polar axis. //. Similar to G except that the large entoderinal gastric ridge prevented closure of the wound. Oral lips and tentacles ha
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 7. Polarity in regeneration. A, B, and C. Thin transverse sections from the upper body region frequently regenerate biapically. D and E. A longi- tudinal quarter of a polyp (hydranth removed) regenerates obliquely, that is, with the hydranth facing upward and also inwards. /• and G. A quarter of a body segment regenerates with the hydranth facing inwards, at right angles to the original polar axis. //. Similar to G except that the large entoderinal gastric ridge prevented closure of the wound. Oral lips and tentacles have formed from the margin of the wound. end; but the hydranth is oblique, facing inward as well as upward (Fig. 7, D and £). If, however, the piece be short, the new hydranth may be entirely symmetric and face directly inward (Fig. 7, F and G.) The oral lips and tentacles are in this case formed from the cut margins of the piece. Indeed, the wound may never close, as in cases in which the entodcrm of the gastric ridge is disproportionately large (Fig. 7, //.) These facts suggest that polarity in scyphistomas is less a matter 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
