. The germ-cell cycle in animals . Cells. Fig. 45. — Copidosoma (Litomastix) truncatellus. A. Oocyte showing germinal vesicle (g.v) containing a chromatin-nucleolus (cm) and a plasmosome (,p). B. Egg a few minutes after deposition showing first maturation spindle (m.s) and " Nucleolo " (N). C. Egg about one hour after deposition, showing three polar bodies (p.b), the first cleavage nucleus and the " Nucleolo." D. Egg in two-cell stage, about one and one-half hours old. p.n = polar nucleus. E. Four-cell stage. F. Egg about four and one-half hours old showing two polar nuclei

. The germ-cell cycle in animals . Cells. Fig. 45. — Copidosoma (Litomastix) truncatellus. A. Oocyte showing germinal vesicle (g.v) containing a chromatin-nucleolus (cm) and a plasmosome (,p). B. Egg a few minutes after deposition showing first maturation spindle (m.s) and " Nucleolo " (N). C. Egg about one hour after deposition, showing three polar bodies (p.b), the first cleavage nucleus and the " Nucleolo." D. Egg in two-cell stage, about one and one-half hours old. p.n = polar nucleus. E. Four-cell stage. F. Egg about four and one-half hours old showing two polar nuclei Stock Photo

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. The germ-cell cycle in animals . Cells. Fig. 45. — Copidosoma (Litomastix) truncatellus. A. Oocyte showing germinal vesicle (g.v) containing a chromatin-nucleolus (cm) and a plasmosome (, p). B. Egg a few minutes after deposition showing first maturation spindle (m.s) and " Nucleolo " (N). C. Egg about one hour after deposition, showing three polar bodies (p.b), the first cleavage nucleus and the " Nucleolo." D. Egg in two-cell stage, about one and one-half hours old. p.n = polar nucleus. E. Four-cell stage. F. Egg about four and one-half hours old showing two polar nuclei dividing, two embryonic cells containing nucleolar substance, and six embryonic cells (dividing) without nucleolar substance. (From Silvestri, 1906.) (147). 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 work.. Hegner, Robert William, 1880-1942. New York : The Macmillan Company

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