. Journal of morphology. 36 37 Fig. 134 Diagram of an egg of Cryptobranchus alleghenionsis in the beginninggastrula stage viewed from the lateral aspect, showing average amount of rotation,and the positions of the beginning blastopore and the septal furrow; blp., blasto-pore; m, morphological axis; , septal furrow; v, vertical axis determined bygravity; , vegetal pole. Fig. 135 Similar diagram of a gastrula at the time when the blastopore reachesthe form of a semicircle. Lettering as before. Fig. 136 Similar diagram of a gastrula at the time when the blastopore firstbecomes a com
. Journal of morphology. 36 37 Fig. 134 Diagram of an egg of Cryptobranchus alleghenionsis in the beginninggastrula stage viewed from the lateral aspect, showing average amount of rotation,and the positions of the beginning blastopore and the septal furrow; blp., blasto-pore; m, morphological axis; , septal furrow; v, vertical axis determined bygravity; , vegetal pole. Fig. 135 Similar diagram of a gastrula at the time when the blastopore reachesthe form of a semicircle. Lettering as before. Fig. 136 Similar diagram of a gastrula at the time when the blastopore firstbecomes a complete circle. Lettering as before. Fig. 137 Combination of the preceding diagrams. The egg is shown in theposi*^ion assumed at the close of the period considered. The black band indicatesthe amount of overgrowth of the dorsal lip of the blastopore (42 degrees); blp.,blp. and hlp^, mark the successive positions of the dorsal lip of the blastopore; and ,successive positions of the septal furrow;/, i)osition of the vanish
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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912
