. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A RESURGENCE OF EXPERIMENTAL EMBRYOLOGY 191 in ethanol and diluted 20-fold in soybean oil. Injected cells con- tinued to divide normally and the injections had no observable effect on development. Embryos were reared at 19°C; and after 24 to 48 h, the cydippid larvae were examined by fluorescence microscopy for the presence of labeled anal canals. Four-cell stage embryos divide to give rise to four middle (M) cells and four end (E) cells. Our injections of blastomeres at the 32-cell stage show that the anal canals are derive
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A RESURGENCE OF EXPERIMENTAL EMBRYOLOGY 191 in ethanol and diluted 20-fold in soybean oil. Injected cells con- tinued to divide normally and the injections had no observable effect on development. Embryos were reared at 19°C; and after 24 to 48 h, the cydippid larvae were examined by fluorescence microscopy for the presence of labeled anal canals. Four-cell stage embryos divide to give rise to four middle (M) cells and four end (E) cells. Our injections of blastomeres at the 32-cell stage show that the anal canals are derived from the en- dodermal derivatives of the second order macromeres of the M lineage, the 2M blastomeres (Fig. Ic, d). Injections of 2M bias- a Pharynx CircumpharyngeaJ muscles. Clene row Longitudinal muscles Anal Canal T— Circumpharynceal and Longitudinal muscles -T. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
