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 174 EMBRYOLOGY OF INSECTS AND MYRIAPODS distinctly separated into right and left halves and covered dorsally by a single layer of cells. Fig. 82.—Isotoma. Cross section of thorax, (cod) Coelome. {ect) Ectoderm. Middle strand of inner layer. (71c) Nerve cord, {th) Thoracic appendage. (mds) The invagination of the embryo into the yolk by buckling of the thoracic section now has reached

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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 174 EMBRYOLOGY OF INSECTS AND MYRIAPODS distinctly separated into right and left halves and covered dorsally by a single layer of cells. Fig. 82.—Isotoma. Cross section of thorax, (cod) Coelome. {ect) Ectoderm. Middle strand of inner layer. (71c) Nerve cord, {th) Thoracic appendage. (mds) The invagination of the embryo into the yolk by buckling of the thoracic section now has reached its maximum (Figs. 83, 84). The dorsal organ (do) now lies in the neck region of the embryo covered laterally by the body wall and in part by the serosa. The yolk is still completely

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