. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 400 JEAN C. DAN clerms, however, Wilson (1895) found the sperm tail being carried away on the outside of the rising fertilization membrane (Toxopneustes) and he was unable to detect it within the cytoplasm of either living or fixed eggs. Consequently, although he cites the work of Ries (1909) to the contrary in his book (which since 1925 has served as the definitive treatise of cytology), his lack of certainty in the matter has created a general impression that echinoderms are an exception to the rule that the entire spermat
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 400 JEAN C. DAN clerms, however, Wilson (1895) found the sperm tail being carried away on the outside of the rising fertilization membrane (Toxopneustes) and he was unable to detect it within the cytoplasm of either living or fixed eggs. Consequently, although he cites the work of Ries (1909) to the contrary in his book (which since 1925 has served as the definitive treatise of cytology), his lack of certainty in the matter has created a general impression that echinoderms are an exception to the rule that the entire spermatozoan enters the egg. The later work of R. Chambers (1933) with Echinaracliniiis parma confirms Wilson's observations. Chambers found that the tail of the partially engulfed spermatozoan is gripped by the expanding fertilization membrane and either car-. OK. 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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