. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 368 EMBRYOLOGY OF INSECTS AND MYRIAPODS terior mesenteron ribbons that grow cephalad from the posterior enteron rudiment at the end of the proctodaeum is similar to the formation of the anterior pair already described. The two pairs of ribbons meet and fuse. Fig. 324.âSciara. Cross section of 60-hour embryo. Differentiation of somatic (som. m) and splanchnic {splm) mesoderm, (ect) Ectoderm, {mge) Mid-gut ep
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 368 EMBRYOLOGY OF INSECTS AND MYRIAPODS terior mesenteron ribbons that grow cephalad from the posterior enteron rudiment at the end of the proctodaeum is similar to the formation of the anterior pair already described. The two pairs of ribbons meet and fuse. Fig. 324.âSciara. Cross section of 60-hour embryo. Differentiation of somatic (som. m) and splanchnic {splm) mesoderm, (ect) Ectoderm, {mge) Mid-gut epithelial ribbons, {nc) Nerve cord. at the fiftieth hour to form two narrow strands of mid-gut epithelium connecting the stomodaeum and proctodaeum. These strands now grow broader until they meet and join along the mid-ventral line to form a shallow trough in which the yolk rests. The U <\ J, : â N. ^^^ ^. b'. 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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