. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 1. FIGURE 2. FIGURE 3. FIGURE 4. FIGURE 5. FIGURE 6. 100 M. FIGURE 7. 6; scale = 100 FIGURE 8. FIGURE 9. Fertilized egg with elevated fertilization membrane; scale — 100 n. Two-cell stage; scale = 100 Eight-cell stage; scale = 100 M- Thirty two-cell stage; scale = 100 p. Early coeloblastula ; scale = 100 p. Beginning of wrinkled blastula stage. Arrow points egression tract; scale = Wrinkled blastula witli conspicuous egression tracts, 2 hours later than Figure Later wrinkled blastula stage; scale = 100 Blast
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 1. FIGURE 2. FIGURE 3. FIGURE 4. FIGURE 5. FIGURE 6. 100 M. FIGURE 7. 6; scale = 100 FIGURE 8. FIGURE 9. Fertilized egg with elevated fertilization membrane; scale — 100 n. Two-cell stage; scale = 100 Eight-cell stage; scale = 100 M- Thirty two-cell stage; scale = 100 p. Early coeloblastula ; scale = 100 p. Beginning of wrinkled blastula stage. Arrow points egression tract; scale = Wrinkled blastula witli conspicuous egression tracts, 2 hours later than Figure Later wrinkled blastula stage; scale = 100 Blastula just after resuming smooth surface; scale = 100 /u. About two or three minutes after insemination, the fertilization membrane began to elevate, and 60 minutes thereafter the process was completed, with a perivitelline space 50 /x height (Fig. 1). The cleavage is of holoblastic, radial type. Seventy minutes after insemination, the first cleavage occurred through the animal-vegetal axis (Fig. 2). The embryos were in the 8-cell stage 120 minutes after insemination (Fig. 3), and in the 32-cell stage 150 minutes after insemina-. 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
