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. 70.—Isotoma. Longitudinal section. Development of meridial furrow (Jr). {do) Dorsal organ, {ect) Ectoderm, {gc) Germ cells, (i/) Inner layer, (j/c) Yolk cell. As the meridian furrow deepens, the dorsal organ is swung out of position (Fig. 71, do). The cuticula {cut), designated by Claypole (1898) as the first crenated membrane, now loosens and lies free between embrvo and Fig. 7

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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 Fig. 70.—Isotoma. Longitudinal section. Development of meridial furrow (Jr). {do) Dorsal organ, {ect) Ectoderm, {gc) Germ cells, (i/) Inner layer, (j/c) Yolk cell. As the meridian furrow deepens, the dorsal organ is swung out of position (Fig. 71, do). The cuticula {cut), designated by Claypole (1898) as the first crenated membrane, now loosens and lies free between embrvo and Fig. 7\.—Isotoma. Longitudinal section. Formation of first crenated membrane {cut), {do) Dorsal organ, {fr) Furrow, {yc) Yolk cell. chorion, and a new cuticula is formed. The chorion then ruptures, and the embryo expands, causing the meridian furrow and all wrinkles to smooth out, the chorion {ch) adhering cap-like in two sections to the

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