. Chimæroid fishes and their development. Fishes; Chimaeridae. 6cB. 65' '5Sig|!:i??i, ^m V* Fig. 65.—Sagittal section ot gashula slightly older than the preceding. ", Archenteron. -S'", Segmentation cavity. 7>'", Posterior mass of cells (in region of ventral lip of blastopore). Fig. 65 A.—Section parallel to preceding, but situated further at the side. Fig. 65 B.—Section parallel to preceding, but more nearly marginal. Fig. 65 C.—Detail showing coarse yolk. now having passed far out over and into the yolk;* (3) anteriorly the segmentation cavity is becoming restricted to a sm
. Chimæroid fishes and their development. Fishes; Chimaeridae. 6cB. 65' '5Sig|!:i??i, ^m V* Fig. 65.—Sagittal section ot gashula slightly older than the preceding. ", Archenteron. -S'", Segmentation cavity. 7>'", Posterior mass of cells (in region of ventral lip of blastopore). Fig. 65 A.—Section parallel to preceding, but situated further at the side. Fig. 65 B.—Section parallel to preceding, but more nearly marginal. Fig. 65 C.—Detail showing coarse yolk. now having passed far out over and into the yolk;* (3) anteriorly the segmentation cavity is becoming restricted to a small area, appearing in surface view as a light- colored tract near the rim of the blastoderm. Two sections of this blastoderm are figured, one sagittal (fig. 66), the other (fig. 66 a) passing between the points A-A shown in surface view. Contrasting the sagittal section (fig. 66) with that of the * The figure represents the circumgerminal zone as too wide and conspicuous, an inaccuracy which was noticed too late for 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
