. The cell in development and inheritance. Cells; Cells. Fig. 128. — Outline of unsegmented squid-s egg, to show bilaterality. [Watase.] A. From right side. B. From the posterior aspect. a-p, antero-posterior axis ; d-v, dorso-ventral axis ; /, left side ; r, right side. Scarcely less striking is the case of the insect o-gg, as has been pointed out especially by Hallez, Blochmann, and Wheeler (Figs. 44, 129). In a large number of cases the is elongated and bilaterally symmetrical, and, according to Blochmann and Wheeler, may even show a bilateral distribution of the yolk corresponding wit
. The cell in development and inheritance. Cells; Cells. Fig. 128. — Outline of unsegmented squid-s egg, to show bilaterality. [Watase.] A. From right side. B. From the posterior aspect. a-p, antero-posterior axis ; d-v, dorso-ventral axis ; /, left side ; r, right side. Scarcely less striking is the case of the insect o-gg, as has been pointed out especially by Hallez, Blochmann, and Wheeler (Figs. 44, 129). In a large number of cases the is elongated and bilaterally symmetrical, and, according to Blochmann and Wheeler, may even show a bilateral distribution of the yolk corresponding with the bilaterality of the ovum. Hallez asserts as the result of a study of the cockroach {Periplaneta), the water-beetle {Hydivphilus), and the locust {Lociista) that " the egg-cell possesses the same orienta- tion as the maternal organism that produces it; it has a cephalic pole and a caudal pole, a right side and a left, a dorsal aspect and a ventral; and these different aspects of the egg-cell coincide with the corresponding aspects of the ;^ Wheeler ('93), after ex- amining some thirty different species of insects, reached the same ^ See Wheeler, '93, p. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York : The Macmillan company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcells, bookyear1896
