. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 252 LAURA HUNTER COLWIN AND ARTHUR L. COLWIN c-d; when first seen it was oscillating like a pendulum with a short stem. Sud- denly it began to whirl freely in many directions, and its filament seemed even shorter; the presumed adhering distal part of the filament was not observed. A number of spermatozoa have been seen with the filament bent permanently (Figs. 2, f, 1, m, 7 and 10). II. Sperm entry A. Thyone briareus Many individual eggs were examined, both from natural sheddings and stripped from the gonads. As lightly inse
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 252 LAURA HUNTER COLWIN AND ARTHUR L. COLWIN c-d; when first seen it was oscillating like a pendulum with a short stem. Sud- denly it began to whirl freely in many directions, and its filament seemed even shorter; the presumed adhering distal part of the filament was not observed. A number of spermatozoa have been seen with the filament bent permanently (Figs. 2, f, 1, m, 7 and 10). II. Sperm entry A. Thyone briareus Many individual eggs were examined, both from natural sheddings and stripped from the gonads. As lightly inseminated cultures of the naturally shed eggs gave 98-99% cleavage and more than 90% active larvae, it was evident that these were. 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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