. The Biological bulletin. Biology; Zoology; Marine biology. Fig. 2. Same equatorial plate drawn-with Zeiss Fig. 3. Nucleus of embryonic cell (^ ) in prophase. x, the unpaired hetero- chromosome. Zeiss Fig. 4. Male embryonic cell in metaphase. x, the unpaired heterochromosome. Zeiss number in non-sexual parthenogenetic eggs ('05, PI. I., Figs, 7 and 12^). This metaphase is shown in Figs, i and 2. The chromosome in the center of the group is the double one. In the first spermatocyte the lagging heterochromosome is the ' " A Study of the Germ Cells oi Aphis rosce and
. The Biological bulletin. Biology; Zoology; Marine biology. Fig. 2. Same equatorial plate drawn-with Zeiss Fig. 3. Nucleus of embryonic cell (^ ) in prophase. x, the unpaired hetero- chromosome. Zeiss Fig. 4. Male embryonic cell in metaphase. x, the unpaired heterochromosome. Zeiss number in non-sexual parthenogenetic eggs ('05, PI. I., Figs, 7 and 12^). This metaphase is shown in Figs, i and 2. The chromosome in the center of the group is the double one. In the first spermatocyte the lagging heterochromosome is the ' " A Study of the Germ Cells oi Aphis rosce and Aphis oenofhetcF^" Jotirn. Exp. ZooL, Vol. II,, No. 3, Aug., 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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