. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HERMAPHRODITISM IN SPELERPES BISLIXKATUS. 133 tion, of course, of the two which contain a large ovum apiece. Most of these cysts are composed of spermatogonia of the last generation, having round or oval nuclei with the chromatin arranged in an irregular network. Nucleoli appear in a few cells of one section. The spermatogonia resemble Kingsbury's Figs, i and 2 ('02). In a few cysts, all the cells are undergoing mitosis. These do not resemble the maturation mitoses described for Desmognathus, and are probably spermatogonial
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HERMAPHRODITISM IN SPELERPES BISLIXKATUS. 133 tion, of course, of the two which contain a large ovum apiece. Most of these cysts are composed of spermatogonia of the last generation, having round or oval nuclei with the chromatin arranged in an irregular network. Nucleoli appear in a few cells of one section. The spermatogonia resemble Kingsbury's Figs, i and 2 ('02). In a few cysts, all the cells are undergoing mitosis. These do not resemble the maturation mitoses described for Desmognathus, and are probably spermatogonial P FIG. 3. Horizontal section through right gonad of hermaphrodite, < 280. / = follicle cell, / = lobule, subdivided into six cysts of spermatogonia, o = ovum, p = peritoneum, spg = spermatogonium, spin = spermatogonial mitosis. In other cysts the nuclei are in the "contracted" condition, described by Kingsbury (Fig. 18), occasionally occurring in Desmognathus fusca at the beginning of the period of growth of spermatogonia into spermatocytes and more commonly, in (hat species, in the last generation of spermatocytes. Fig. 3 shows an egg filling one lobule and surrounded by follicle cells. In this case, as well as in the left gonad, the relation to follicle cells and to peritoneum is normal. The adjacent lobules show sper-. 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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