. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 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. Fig. 129.—Blattella! Section through stomodaeum {stom) of five-day embryo, {am) Amnion, {ect) Ect
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 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. Fig. 129.—Blattella! Section through stomodaeum {stom) of five-day embryo, {am) Amnion, {ect) Ectoderm, {mes) Mesoderm, {ser) Serosa. yolk to become vitellophags. Shortly afterward the embryonic rudiment forms in the middle half on the ventral surface (along the V-shaped ridge) of the egg, the blastoderm on the dorsal and lateral surface becoming thin. 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
