. Chimæroid fishes and their development. Fishes; Chimaeridae. GA) in the posterior portion of this rim the ectoderm is already differentiating the medullary plate of the embryo, ///; that (/) the major growth has taken place backward—in witness of this, contrast the distance between the anterior end of the archenteron and the posterior rim of the blastopore in these two stages; that (d) in this connection the main cell-mass extends itself dorsalward and becomes the plateau-like region of the blastoderm; that (c) the germinal wall rising abruptly beside the archenteron in the earlier stage bec
. Chimæroid fishes and their development. Fishes; Chimaeridae. GA) in the posterior portion of this rim the ectoderm is already differentiating the medullary plate of the embryo, ///; that (/) the major growth has taken place backward—in witness of this, contrast the distance between the anterior end of the archenteron and the posterior rim of the blastopore in these two stages; that (d) in this connection the main cell-mass extends itself dorsalward and becomes the plateau-like region of the blastoderm; that (c) the germinal wall rising abruptly beside the archenteron in the earlier stage becomes excavated in. Fig. 66.—Sagittal section of gastrula in which the embryo is appearing. fl^ Afchenleron. '1 Region of oulermost maTgin of ventral lip of blastopore. ptii, Posterior mass of cells (in rwsition of ventral lip of blastopore). ^'Pt Region of blastopore. '". Thickening in medullary plate of embryo. .*"'. Segmentation cavity. m-. 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 Dean, Bashford, 1867-1928. Washington, D. C. , Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfishes, bookyear1906
