. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. stom VSP. Fig. 123.—Libellula. prod- Dorsal aspect of nine-day living embryo, {prod) Proctodaeum. (stom) Stomodaeum. (ysp) Yolk spherule. defined, and the bulbous end of the stomodaeum is apparent as well as the smaller expanded end of the proctodaeum extending into the yolk (Fig. 123). Movement of the mid-gut is evident in a live egg at this stage in development. Further reduction of the yolk in the compar
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. stom VSP. Fig. 123.—Libellula. prod- Dorsal aspect of nine-day living embryo, {prod) Proctodaeum. (stom) Stomodaeum. (ysp) Yolk spherule. defined, and the bulbous end of the stomodaeum is apparent as well as the smaller expanded end of the proctodaeum extending into the yolk (Fig. 123). Movement of the mid-gut is evident in a live egg at this stage in development. Further reduction of the yolk in the compartments causes their walls to shrink away from the center of the mid-intestine, leaving an irregular lumen extending from the stomodaeum to the proctodaeum (Fig. 124, lu). This lumen is not evident throughout its entire length in Plathemis lydia until shortly before hatching on the fourteenth day. The nymph of Plathemis emerges from the egg during the fourteenth day. The newly emerged nymph has a round bulbous head and a long slender abdomen; its legs remain in the same position under the abdomen. 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
