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 coel Fig. 148.—Locusta. Cross section stcond maxillary segment, of 56-hour embryo, {coel) Coelomic cavity, {ect) Ectoderm, {mes) Mesoderm forming coelomic sac. ser am Fig. 149.—Locwsto. Cross section of ninth abdominal segment of 72-hour embryo. {am) Amnion, {am. cav) Amniotic cavity, {dc) Provisional dorsal closure, {ect) Ecto- derm, {il) Inner layer, {ser) Serosa. mes coel

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