. Journal of morphology. 63 64 Fig. 163 Diagram of an embryo of Cryptobranchus allegheniensis at the closeof Stage 13, showing the position of the neural plate and neural folds with refer-ence to the morphological and the vertical axes; m, morphological axis; v, verticalaxis. Fig. 164 Diagram showing the position of the embryonic body of Crypto-branchus allegheniensis, and illustrating some features of embryo-formation;a to b (72 degrees), portion of the embryo formed in situ; 6 to c (60 degrees), por-tion formed by overgrowth of the dorsal lip of the blastopore, with the possibilityof concres
. Journal of morphology. 63 64 Fig. 163 Diagram of an embryo of Cryptobranchus allegheniensis at the closeof Stage 13, showing the position of the neural plate and neural folds with refer-ence to the morphological and the vertical axes; m, morphological axis; v, verticalaxis. Fig. 164 Diagram showing the position of the embryonic body of Crypto-branchus allegheniensis, and illustrating some features of embryo-formation;a to b (72 degrees), portion of the embryo formed in situ; 6 to c (60 degrees), por-tion formed by overgrowth of the dorsal lip of the blastopore, with the possibilityof concrescence; c to d (roughly estimated at 16 degrees), portion undoubtedlyformed by concrescence; d to e (60 degrees), distance traveled by the ventral lipof the blastopore. Other lettering as in the preceding figure. We now have sufficient data for a statement of the positionof the embryonic body on the egg, and for pointing out certainfeatures of its mode of formation (figs. 163 and 164). About72 degrees of the anterior end
Size: 1526px × 1637px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912
