. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. D. FIG. 8. Stages in the disintegration of eggs in an early gastrula stage following several hours exposure to ml 1,000 KNC, or in m[i,000,000 HgCh. The progress of disintegration follows this general plan in all agents in concentrations that kill the egg within several hours. takes place apical to an original equatorial blastopore (Fig. 18). The "gastrular angle" is the angle between a plane through the center of the egg parallel to the floor of the segmentation cavity, and a line through the center of the egg and


. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. D. FIG. 8. Stages in the disintegration of eggs in an early gastrula stage following several hours exposure to ml 1,000 KNC, or in m[i,000,000 HgCh. The progress of disintegration follows this general plan in all agents in concentrations that kill the egg within several hours. takes place apical to an original equatorial blastopore (Fig. 18). The "gastrular angle" is the angle between a plane through the center of the egg parallel to the floor of the segmentation cavity, and a line through the center of the egg and the blastopore (Fig. 9). Obviously, comparison of the gastrular angle of normal eggs with this angle in inhibited eggs is possible only at the beginning of gastrulation. The development of the frog is so well known that a detailed description of the process is unnecessary. However, mention of several features of normal development will be of use for comparison with abnormal 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