. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. FiQ. 139.—Lo- custa. Embryonic re- gion. 28-hour stage, (yc) Secondary yolk Fig. 140.—Locusta. 30-hour stage, (c) Cells proliferating from roof of ventral groove {vg). iy) Yolk, (yc) Secondary yolk cells, (ycm) Yolk-cell membrane. (Figs. 142, 143, 144, il). The ectoderm, or outer layer, now becomes more than one-layered in places, the lateral halves of the germ band becoming thicker in the middle tha

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. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. FiQ. 139.—Lo- custa. Embryonic re- gion. 28-hour stage, (yc) Secondary yolk Fig. 140.—Locusta. 30-hour stage, (c) Cells proliferating from roof of ventral groove {vg). iy) Yolk, (yc) Secondary yolk cells, (ycm) Yolk-cell membrane. (Figs. 142, 143, 144, il). The ectoderm, or outer layer, now becomes more than one-layered in places, the lateral halves of the germ band becoming thicker in the middle than on the 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 Johannsen, O. A. (Oskar Augustus), 1870-1961; Butt, Ferdinand Hinckley, 1899-. New York, London, McGraw-Hill Book Company, inc.

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity