. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 586 GEORGE E. WHEELER. 25 • 26 * \ ' 28 29 FIGURES 10-14. Radial sections of early, of mid-, and of late blastulae, showing spindles aligned for radial cleavage (compare Fig. 1, cells A, B, C). Most spindles are in equatorial view, but there are several in oblique aspect. In Figure 14, the arrows point to spindles seen in polar view. FIGURES 15-17. Median longitudinal sections of gastrulae, showing radial cleavages. In Figures 15 and 17, anaphasic or telophasic spindles project toward the archenteron, above the level of the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 586 GEORGE E. WHEELER. 25 • 26 * \ ' 28 29 FIGURES 10-14. Radial sections of early, of mid-, and of late blastulae, showing spindles aligned for radial cleavage (compare Fig. 1, cells A, B, C). Most spindles are in equatorial view, but there are several in oblique aspect. In Figure 14, the arrows point to spindles seen in polar view. FIGURES 15-17. Median longitudinal sections of gastrulae, showing radial cleavages. In Figures 15 and 17, anaphasic or telophasic spindles project toward the archenteron, above the level of the nuclei in other cells of the endoderm. In Figures 16 (above) and 17 (see arrow), mitotic figures of the ectoderm project out beyond the other nuclei. This phenomenon is obscured in Figure 17 due to a mild distortion, presumably resulting from pressure of another. 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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