. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 307.—Diacrisia. Cross section of head of 65-hour embryo. A, through man- dibular segment. B, through labial segment, {am) Amnion; (t) inner, (o) outer, {amf) Amniotic fold, {ect) Ectoderm, {gl) Hypostigmatic gland, {lb) Base of labium, {md) Base of mandible, {mes) Mesoderm, {mge) Strand of mid-gut epithelium, {nc) Ventral nerve cord, {neurg) Neural groove, {silkg) Silk-gland invagination, {splm) Splanc
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 307.—Diacrisia. Cross section of head of 65-hour embryo. A, through man- dibular segment. B, through labial segment, {am) Amnion; (t) inner, (o) outer, {amf) Amniotic fold, {ect) Ectoderm, {gl) Hypostigmatic gland, {lb) Base of labium, {md) Base of mandible, {mes) Mesoderm, {mge) Strand of mid-gut epithelium, {nc) Ventral nerve cord, {neurg) Neural groove, {silkg) Silk-gland invagination, {splm) Splanchnic mesoderm, {suboesb) Subesophageal body, {y) Yolk. ;•»—mge - -splm 5?. itv'',, v' A-Silkg / r -tr ;i '._. •'./'—splm " - -silkg. A B Fig. 308.—Diacrisia. A, section through neck region. B, through mesothorax of 65-hour embryo, {am) Amnion, {mge) Mid-gut epithelial strand, (p) Leg. {silkg) Silk gland, {splm) Splanchnic mesoderm, {tr) Trachea, {tr. i) Tracheal invagination. {trich) Trichogen Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Johannsen, O. A. (Oskar Augustus), 1870-1961; Butt, Ferdinand Hinckley, 1899-. New York, London, McGraw-Hill Book Company, inc.
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
