. Chimæroid fishes and their development. Fishes; Chimaeridae. 76 CHIMyEROID FISHES AND THEIR DEVELOPMENT. far forward, almost to the end of the cmbrj'onic i;ut, the band of fusion extending in a narrow zone as denoted at .r, iig. 69 11. (3) The concentration of the j'olk- entoblast under the embryonic body; this becomes conspicuous quite in front of the embrj'onic gut, then merges with the gut, then separates from it, and, as the lumen of the gut opens out ventrally, it proceeds backward in a layer finally rounding. Fig. 69 A M. âTransverse sections through early embryo and neighboring blast
. Chimæroid fishes and their development. Fishes; Chimaeridae. 76 CHIMyEROID FISHES AND THEIR DEVELOPMENT. far forward, almost to the end of the cmbrj'onic i;ut, the band of fusion extending in a narrow zone as denoted at .r, iig. 69 11. (3) The concentration of the j'olk- entoblast under the embryonic body; this becomes conspicuous quite in front of the embrj'onic gut, then merges with the gut, then separates from it, and, as the lumen of the gut opens out ventrally, it proceeds backward in a layer finally rounding. Fig. 69 A M. âTransverse sections through early embryo and neighboring blastoderm of stage corresponding to that of plate V, fig. 33. The series passes from in front backward. f. Yolk region intruding bclween caudal folds; .'/'", gut cavity; ^", mesoblast; V. yolk lying in cavity of gut; -'â , (old near poslerior end of embryo where ectoderm and entoderm merge. outward on either side. (4) The presence in the cavity of the embr^-onic gut of small masses of the disintegrating segments of the egg (fig. 69 g, £-c), which serve probabl}' as food, interesting in connection with the fate of the yolk in Chimaera {cf. in stages of Plate viii). Contrasting the foregoing conditions with those in an elasmobranch in stage b {c. g., as shown by the Zieglers, Archiv f. mikr. Anatomic,. 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
Size: 1576px × 1585px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfishes, bookyear1906
