. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SPERM ATOGENESIS IN PATIRIA MINI ATA 319. FIGURE 3. Autoradiograms showing various reproductive states of testes from Patiria miniata. Arrows indicate areas with silver grains representing DNA synthesis. Scale = 100 ^m. A: (inactive). B: (early spermatogenesis). C: (active spermatogenesis). G, C, and T indicate areas of the spermatogonia, sper- matocytes, and spermatids, respectively, in the spermatogenic columns of the germinal epithelium. Z indicates sperm in the lumen. D: (active spermatogenesis), with bra
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SPERM ATOGENESIS IN PATIRIA MINI ATA 319. FIGURE 3. Autoradiograms showing various reproductive states of testes from Patiria miniata. Arrows indicate areas with silver grains representing DNA synthesis. Scale = 100 ^m. A: (inactive). B: (early spermatogenesis). C: (active spermatogenesis). G, C, and T indicate areas of the spermatogonia, sper- matocytes, and spermatids, respectively, in the spermatogenic columns of the germinal epithelium. Z indicates sperm in the lumen. D: (active spermatogenesis), with branching germinal epithelium. E: F: (ripe). A testis consists of lobulated sacs. Around the inner wall of a testicular lobe is the germinal epithelium, containing various types of germinal cells, which may be distin- guished from one another on the basis of position, size, appearance of chromatin, and staining intensity. In a testis actively producing sperm (cf. Fig. 3C), the germinal ep- ithelium is comprised of columns, with the spermatogonia at the base, followed distally by spermatocytes, then spermatids. In a testis, most of the spermatocytes closer to the bases of the columns have radioactive label over them, while fewer of the. 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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