. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 64.—Isotoma. Egg in eight-cell stage. Fig. 65.—Isotoma. 64-cell stage. cells in being vacuolate, and the cluster of germ cells {gc) now avcII differentiated. The embryo has now become oval with a somewhat accentuated pole where the dorsal organ will develop. The cells of this organ (rfc), devel- oped from the outer layer and increasing in depth, soon are sharply. Fig. 66.—Isotoma. Peripheral migration
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 64.—Isotoma. Egg in eight-cell stage. Fig. 65.—Isotoma. 64-cell stage. cells in being vacuolate, and the cluster of germ cells {gc) now avcII differentiated. The embryo has now become oval with a somewhat accentuated pole where the dorsal organ will develop. The cells of this organ (rfc), devel- oped from the outer layer and increasing in depth, soon are sharply. Fig. 66.—Isotoma. Peripheral migration of cleavage cells. differentiated from the adjacent cells, beneath which the inner layer of cells degenerate (Fig. 69). The cells of the dorsal organ later become elongate and strongly vacuolate. While this organ is developing, the outer layer of cells of the embryo begins to secrete a cuticula. After. 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
