. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 3. Diagram indicating plane of section at each stage. Dotted line, animal elements; fine continuous line, vegetal elements. Thick straight line, plane of sections ; broken line, original egg-axis. Stages of operation numbered as follows: (1), 2-cell. (3), 16-cell. (4)a, grooved blastula. (4)b, blastula with primary mesenchyme cells. (5)a, gastrula with archenteron and two small triradiate spicules. (5)b, late gastrula with amniotic invagination. (6)a, early pluteus with two fully developed arms but without adult skele
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 3. Diagram indicating plane of section at each stage. Dotted line, animal elements; fine continuous line, vegetal elements. Thick straight line, plane of sections ; broken line, original egg-axis. Stages of operation numbered as follows: (1), 2-cell. (3), 16-cell. (4)a, grooved blastula. (4)b, blastula with primary mesenchyme cells. (5)a, gastrula with archenteron and two small triradiate spicules. (5)b, late gastrula with amniotic invagination. (6)a, early pluteus with two fully developed arms but without adult skeleton. (6)b, pluteus with some adult skeleton. (6)c, late pleuteus with well developed adult skeleton. 100 50. 11 (3) (4b> (5) (6) c FIGURE 4. Percentage of metamorphosis of separated halves olPeroneUa japonica Mortensen, Dotted line, meridional halves. Thick continuous line, meridional pairs. Thick broken line, vegetal (posterior) halves. Fine broken line, animal (anterior) halves. Fine continuous line, equatorial 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
