. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. ORTHOPTEROIDEA (PANORTHOPTERA) 231 smaller dorsoanal pouch (Fig. 152), the ventral pouch completely fining the antenna. The dorsorostral portions of the two coelomic sacs, shortly before blastokinesis, approach each other; their median walls fuse and thus form the anterior portion of the cephalic aorta which func- tions as a blood-distributing apparatus. The median walls of the dorso- am Fig. 153.—Locusta.
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. ORTHOPTEROIDEA (PANORTHOPTERA) 231 smaller dorsoanal pouch (Fig. 152), the ventral pouch completely fining the antenna. The dorsorostral portions of the two coelomic sacs, shortly before blastokinesis, approach each other; their median walls fuse and thus form the anterior portion of the cephalic aorta which func- tions as a blood-distributing apparatus. The median walls of the dorso- am Fig. 153.—Locusta. Cross section of mandibular segment of 75- to 80-hour embryo. {am) Amnion. (W) Blood cells, {coel) Coelomic cavity, imd) Mandible, (suboesb) Developing subesophageal body. anal pouch form the proximal part of the cephalic aorta; the lateral walls form fatty tissue. The walls of the ventral pouch are converted into antennary muscles. The antennary coelomic sacs are the largest in the body and form, in addition to that mentioned above, the investment of the pharyngeal ganglion and of the corpora allata. dc mes bl ^PS. coel. 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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