. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 2. FIG. 4. FIG. I. A portion of the posterior end of an egg of C. bigsbyana in longitudinal section showing the arrangement of the pole-disc granules (pd-g)- ,V = yolk; khbl - " ; FIG. 2. Longitudinal section through the posterior end of an egg of C. bigsbyana showing the primordial germ-cells (pc) containing pole-disc granules (pd-g}. Nuclei which are prevented from forming blastoderm cells produce a pseudoblasto- dermic syncytium (psbl}. The letters indicate the canal throu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 2. FIG. 4. FIG. I. A portion of the posterior end of an egg of C. bigsbyana in longitudinal section showing the arrangement of the pole-disc granules (pd-g)- ,V = yolk; khbl - " ; FIG. 2. Longitudinal section through the posterior end of an egg of C. bigsbyana showing the primordial germ-cells (pc) containing pole-disc granules (pd-g}. Nuclei which are prevented from forming blastoderm cells produce a pseudoblasto- dermic syncytium (psbl}. The letters indicate the canal through which the pole-cells later migrate into the embryo. bl= blastoderm. _y = yolk. FIG. 3. A single primordial germ-cell showing pole-disc granules (}. FIG. 4. Longitudinal section through the posterior end of the egg of C. lunata described in Exp. 2a. The letter <t indicates where germ-cells would be found in an uninjured egg. &/= blastoderm, y = yolk. cleavage nuclei increase rapidly in numbers and migrate in all directions toward the periphery reaching the " Kleimhautblastem " at the expiration of eighteen hours. Those nuclei (sixteen in. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
