. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. KlG. 12. FIG. 13. sonable to suppose that they are simply belated portions which have not yet been transformed into the homogene- ous mass. Fig. 7 shows a condition in which only the nuclei remain. At no time during the formation of the blastophore has a proliferation of the central cells been observed. The spermatophore becomes slightly modified in passing from the sperm-sac to the spermatheca, as shown in Figs. 12, 14, 15. It is to be noticed that the tails of the spermatozoa turn spirally ; this being a secondarily acquir
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. KlG. 12. FIG. 13. sonable to suppose that they are simply belated portions which have not yet been transformed into the homogene- ous mass. Fig. 7 shows a condition in which only the nuclei remain. At no time during the formation of the blastophore has a proliferation of the central cells been observed. The spermatophore becomes slightly modified in passing from the sperm-sac to the spermatheca, as shown in Figs. 12, 14, 15. It is to be noticed that the tails of the spermatozoa turn spirally ; this being a secondarily acquired character oc- casioned by its passage through the sperm-duct. Following these changes, the sperm-blastophore becomes more or less spindle-shaped ; it also decreases in size. In the cross-section of a spermatophore a central canal is generally to be seen, as represented in Fig. 15. The blastophores are at first com-. 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
