. The development of the frog's egg; an introduction to experimental embryology. Embryology. 78 DEVELOPMEXT OF THE FROG'S EGG [Cn. YII the blastopore is injured with a needle at the moment of its appearance, or if the yolk-mass in front of the dorsal lip is injured so that the yolk protrudes from the general rounded surface of the egg. The blastopore is thus prevented from extending backward, and its material differentiates, in situ, along the equatorial line. The lateral lips tend to approach the middle line and to fuse, but the medullary folds may appear before the fusioii has taken place. T
. The development of the frog's egg; an introduction to experimental embryology. Embryology. 78 DEVELOPMEXT OF THE FROG'S EGG [Cn. YII the blastopore is injured with a needle at the moment of its appearance, or if the yolk-mass in front of the dorsal lip is injured so that the yolk protrudes from the general rounded surface of the egg. The blastopore is thus prevented from extending backward, and its material differentiates, in situ, along the equatorial line. The lateral lips tend to approach the middle line and to fuse, but the medullary folds may appear before the fusioii has taken place. There is thus pro-. 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 Morgan, Thomas Hunt, 1866-1945. New York, The Macmillan company; [etc. , etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectembryology, bookyear1
