. The Biological bulletin. Biology; Zoology; Marine biology. DETERMINATION IN CEREBRATULUS EMBRYO 329 F. Isolation of an^ + vegi + vegi The best one of two fragments of this kind that Zeleny obtained {cf. above) formed a ciliated rotating embryo, with a large solid arch- enteron filling up the cavity of the blastocoel. Neither apical organ nor lappets were present. Of the five larvae only one developed really well. In the early gastrula stage the archenteron seemed to fill up the entire blastocoel, as Zeleny found. Also in the early pilidium the archenteron looked very large in comparison to t
. The Biological bulletin. Biology; Zoology; Marine biology. DETERMINATION IN CEREBRATULUS EMBRYO 329 F. Isolation of an^ + vegi + vegi The best one of two fragments of this kind that Zeleny obtained {cf. above) formed a ciliated rotating embryo, with a large solid arch- enteron filling up the cavity of the blastocoel. Neither apical organ nor lappets were present. Of the five larvae only one developed really well. In the early gastrula stage the archenteron seemed to fill up the entire blastocoel, as Zeleny found. Also in the early pilidium the archenteron looked very large in comparison to the ectoderm. A day later this was no longer the case to such an extent as one would have expected after removal of such a large part of the presumptive ectoderm (Fig, 8, A).. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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