. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. if-emb Fig. 338.—Scolopendra cingulata. (emb) Embryonic rudiment, (cp) Cumulus primitivus (early rudiment), {yp) Yolk pyramid (macromere). (Adapted from Heymons.) Germ Layers.—The germ disk by rapid mitotic division soon becomes several layers thick (Fig. 339), in structure resembling the cumulus primitivus in spiders, the yolk masses immediately below being broken up. A few cells set free from the inner su
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. if-emb Fig. 338.—Scolopendra cingulata. (emb) Embryonic rudiment, (cp) Cumulus primitivus (early rudiment), {yp) Yolk pyramid (macromere). (Adapted from Heymons.) Germ Layers.—The germ disk by rapid mitotic division soon becomes several layers thick (Fig. 339), in structure resembling the cumulus primitivus in spiders, the yolk masses immediately below being broken up. A few cells set free from the inner surface wander into the yolk, forming yolk cells, which are found not only on the dividing surfaces of. 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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