Embryology of insects and myriapods; Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching embryologyofinse00joha Year: 1941 Fig. 150.—Locusta. Cross section of second abdominal segment, {am) Amnion, {coel) Coelomic cavity, {ect) Ectoderm, {mes) Mesoderm. am Fig. 151.—Locusta. Cross section of fourth abdominal segment of 75-hour embryo. {am) Amnion, {coel) Coelomic sac. {dc) Provisional dorsal closure, {ect) Ectoderm. {mes) Median mesoderm.

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