. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 106 A. J. WATERMAN Considerable activity occurred in this region as evidenced by a bubbling of the cortical area without entire disappearance of the parts of the fertilization cone. All but one of the exudations soon disappeared and this one turned out to be the first polar body (text fig. 1). The time involved in the early developmental stages has been care- fully followed in several cases. Eggs shed at 11:49 were fertilized at 11 : 49 by sperm shed at 9:00. The fertilization cone reached its maximum size by 11: 52, after w
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 106 A. J. WATERMAN Considerable activity occurred in this region as evidenced by a bubbling of the cortical area without entire disappearance of the parts of the fertilization cone. All but one of the exudations soon disappeared and this one turned out to be the first polar body (text fig. 1). The time involved in the early developmental stages has been care- fully followed in several cases. Eggs shed at 11:49 were fertilized at 11 : 49 by sperm shed at 9:00. The fertilization cone reached its maximum size by 11: 52, after which it was retracted, pulling membrane and attached spermatozoon with it. By 11:56 it had disappeared, leaving a fine filament extending from egg surface to membrane at the. 11-51. 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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