. The cell in development and inheritance. Cells. Fig. loi. — Pathological polyspermy. A. Polyspermy in the egg of .•:/jca;v\f ,• below, the egg-nucleus ; above, three entire spermatozoa within the egg. [Sala.] B. Polyspermy in sea-urchin egg treated with nicotine solution; ten sperm-nuclei shown, three of which have conjugated with the egg-nucleus. C. Later stage of an egg similarly treated, showing polyasters formed by union of the sperm-amphiasters. [O. and R. Hertwig.] of the polar bodies, have no power to form a vitelline membrane, and the spermatozo,a always enter them in consider
. The cell in development and inheritance. Cells. Fig. loi. — Pathological polyspermy. A. Polyspermy in the egg of .•:/jca;v\f ,• below, the egg-nucleus ; above, three entire spermatozoa within the egg. [Sala.] B. Polyspermy in sea-urchin egg treated with nicotine solution; ten sperm-nuclei shown, three of which have conjugated with the egg-nucleus. C. Later stage of an egg similarly treated, showing polyasters formed by union of the sperm-amphiasters. [O. and R. Hertwig.] of the polar bodies, have no power to form a vitelline membrane, and the spermatozo,a always enter them in considerable numbers. Polyspermy also takes place, as O. and R. Hertwig's beautiful ex- periments showed ('87), in ripe eggs whose vitality has been dimin- ished by the action of dilute poisons, such as nicotine, strychnine, and morphine, or by subjection to an abnormally high temperature. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcells, bookyear1911
