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 n Fig. 90.—Isotoma. Sagittal section through head. (am. ser) Amnioserosa. {hr) Brain. {Ir) Labrum. {mge) Mid- gut epithelium, {mus) Muscle, (n) Nerve tissue, (stom) Stomodaeum. (yc) Yolk cell. mge procf — rnus Fig. 91.—Isotoma. Sagittal sec- tion of posterior end of body. (am. ser) Amnioserosa. (mge) Mid-gut ep- ithelium, (mus) Muscle, (n) Nerve tissue, iproct) Proctodaeum. former somew

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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 n Fig. 90.—Isotoma. Sagittal section through head. (am. ser) Amnioserosa. {hr) Brain. {Ir) Labrum. {mge) Mid- gut epithelium, {mus) Muscle, (n) Nerve tissue, (stom) Stomodaeum. (yc) Yolk cell. mge procf — rnus Fig. 91.—Isotoma. Sagittal sec- tion of posterior end of body. (am. ser) Amnioserosa. (mge) Mid-gut ep- ithelium, (mus) Muscle, (n) Nerve tissue, iproct) Proctodaeum. former somewhat geniculate (Fig. 92), the latter widening at the tip and freed from inner-layer cells. Malpighian tubules do not develop. The cells of the anterior and posterior cell masses (mid-gut epithelium rudiments) now enlarge; from each lateral edge a cell strand arises, the two arising from the stomodaeum growing backward, those from the

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