. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. ORTHOPTEROIDEA (PANORTHOPTERA) 213 convex on one side, straight on the other, and much compressed (Fig. 128), with the micropyles scattered over a quadrant of its upper half. The first maturation division of the egg nucleus occurs before the egg is enclosed. Fig. 128.—BlaUella. Lateral aspect of egg. A, before cleavage. B, after cleavage. {From Wheeler.) in its ootheca. After fertilization the cleavage cell
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. ORTHOPTEROIDEA (PANORTHOPTERA) 213 convex on one side, straight on the other, and much compressed (Fig. 128), with the micropyles scattered over a quadrant of its upper half. The first maturation division of the egg nucleus occurs before the egg is enclosed. Fig. 128.—BlaUella. Lateral aspect of egg. A, before cleavage. B, after cleavage. {From Wheeler.) in its ootheca. After fertilization the cleavage cells migrate to the egg surface, the blastoderm being completed in about 60 hours at 27°C. After reaching the surface some of the cleavage cells turn back into 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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