. Carnegie Institution of Washington publication. Hyhridization of Echinoids. 25 During division the yolk and oil droplets seem forcibly pushed out of the region of the amphiaster, which lies in a region of clear cyto- plasm. As the cell passes into the telophases of division the yolk and oil droplets are carried inward and again lie distributed uniformly through the cell. Fig. 8, a, b, and c. Three successive sections of a first-cleavage amphiaster. One heterotypic chromosome, I <^ b c , c, 6, and c. Three successive sections of a first-cleavage amphiaster. Two heterochromosom
. Carnegie Institution of Washington publication. Hyhridization of Echinoids. 25 During division the yolk and oil droplets seem forcibly pushed out of the region of the amphiaster, which lies in a region of clear cyto- plasm. As the cell passes into the telophases of division the yolk and oil droplets are carried inward and again lie distributed uniformly through the cell. Fig. 8, a, b, and c. Three successive sections of a first-cleavage amphiaster. One heterotypic chromosome, I <^ b c , c, 6, and c. Three successive sections of a first-cleavage amphiaster. Two heterochromosomes. One chromosome divided and lagging at the center. In the anaphase plates 32-32. The chromosomes divide and move apart with great regularity; lagging chromosomes are seen only rarely (figs. 9a and 96). Figures 6, 7, and 9 are of anaphase plates showing two of the double-armed rods in each plate of chromosomes; in figures 8 and 10 but one of these chromosomes of double width could be found. In figure 11a only one section of the spindle is shown; in this egg no chromosomes of double width could be found; there is, instead, a chromosome of. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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