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. abd4â abd3- mx I ma abd' 79.âIsotoma. Longitudinal section, {abd) Abdominal rudiments, {do) Dorsal organ, {hi) Head lobe, {md) Mandible, (mx) Maxillae. evident. The stomodaeum, which made its appearance a short time before, has lengthened, the apex of the invagination reaching the yolk (Fig. 80), the inner layer being absent at this point. Both in front of and behind the stomodaeum
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. abd4â abd3- mx I ma abd' 79.âIsotoma. Longitudinal section, {abd) Abdominal rudiments, {do) Dorsal organ, {hi) Head lobe, {md) Mandible, (mx) Maxillae. evident. The stomodaeum, which made its appearance a short time before, has lengthened, the apex of the invagination reaching the yolk (Fig. 80), the inner layer being absent at this point. Both in front of and behind the stomodaeum is a cell mass which will give rise to the anterior '=-?S sfom Fig. 80.âIsotoma. Sagittal section of anterior end. {am. ser) Amnioserosa. {hi) Head lobe. {Ir) Labrum. {nc) Nerve {stom) Stomodaeum. â md Fig. 81.âIsotoma. Cross section of mandibular segment, {coel) Coelome. {ect) Ectoderm, {md) Mandible, (mds) Middle strand of inner layer, {n) Nerve tissue, {si) Superlingua. end of the future digestive epithelium of the ventriculus. Meanwhile, the cells of the nervous system (Figs. 81, 82) become more sharply marked,
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