. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 182 EMBRYOLOGY OF INSECTS AND MYRIAPODS The figured embryonic development of the collembolan Anurida maritima as and described by Claypole (1898) agrees in most particulars with that of Isotoma cinerea as outlined above. Philiptschenko (1912) points out a few discrepancies which he ascribes to differences in interpretation. It is conceivable that the "diffuse" middle strand here described together
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. 182 EMBRYOLOGY OF INSECTS AND MYRIAPODS The figured embryonic development of the collembolan Anurida maritima as and described by Claypole (1898) agrees in most particulars with that of Isotoma cinerea as outlined above. Philiptschenko (1912) points out a few discrepancies which he ascribes to differences in interpretation. It is conceivable that the "diffuse" middle strand here described together with the cell masses that surround the stomo- daeal and proctodaeal rudiment constitutes the preprimordium of the entoderm and that cells im- mediately adjacent represent mesoderm. DIPLURA Campodea staphylinus Westw. Campodea staphylinus. abd4 proc Fig. 99.âIsotoma. Oblique frontal sec- tion of posterior end of body, (abd) Abdom- inal appendages, (gc) Germ cells, (mus) Muscle, iproct) Proctodaeum. (yc) Yolk cells. IS a slender insect about 6 mm. long living in damp places under stones or in rotten wood and leaves. The species occurs in Europe, but members of the genus occur also in the United States. The eggs, according to Uzel (1898), are laid during the warmer months in clumps of four or five or, less commonly, either fewer or â -^bld % % ^. 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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