. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 72 JEFFREY 1). CiREEN ;... ;s. 'V \ : ;•«. FIGURES 9-14. Heidenhain's hematoxylin stained, sectioned gonads of Leptosynapta tennis showing testicular stages and spermatogenesis. FIGURE 9. Testicular region of gonad with presumed spermatogonia (arrow), spermato- cytes (spc), and spermatozoa (twin arrows). Scale is 10 /mi. FIGURE 10. Stage I testicular region with relict spermatozoa in the gonadal lumen. Scale is 20 /urn. FIGURE 11. Gonad in stage II testicular condition; gonadal lumen (him). Scale is 50 /xm. FIGURE 12. Stage
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 72 JEFFREY 1). CiREEN ;... ;s. 'V \ : ;•«. FIGURES 9-14. Heidenhain's hematoxylin stained, sectioned gonads of Leptosynapta tennis showing testicular stages and spermatogenesis. FIGURE 9. Testicular region of gonad with presumed spermatogonia (arrow), spermato- cytes (spc), and spermatozoa (twin arrows). Scale is 10 /mi. FIGURE 10. Stage I testicular region with relict spermatozoa in the gonadal lumen. Scale is 20 /urn. FIGURE 11. Gonad in stage II testicular condition; gonadal lumen (him). Scale is 50 /xm. FIGURE 12. Stage III testicular tissue (arrow) between oocytes. First indication of sperm- atogenesis for 1973 occurred in February. Scale is 50 Mm. FIGURE 13. Stage IV testicular tissue (arrow). Spermatozoa have not yet appeared in the gonadal lumen. Scale is 50 ,um. FIGURE 14. Stage V testicular tissue (arrow). Spermatozoa fill the lumen. Scale is 50 residual sperm may have remained in the lumen (Fig. 10), and the spermatocyte layer had disappeared. In stage II, the testicular components of the gonad were inconspicuous (Fig. 11). Any spermatogonia which may have been present were not distinguishable from oogonia. Beginning spermatogenesis marked stage III (Fig. 12), in which there were clumps of spermatogonia and spermatocytes two or three cells thick scattered around the gonad periphery between oocytes. Advanced spermatogenesis, with a thick spermatocyte layer of intensely stained cells, was characteristic of stage IV (Fig. 13). Spermiogenesis, however, was not very advanced, as evidenced by a patent lumen. Stage V was the mature stage (Fig. 14). A thick spermatocyte layer persisted, but the lumen was packed with sperm- atids and spermatozoa. Gonad smears produced actively swimming sperm. As spermatogenesis proceeded in stage V, the spermatocyte layer was reduced, so that. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
