. Journal of morphology. 169 170 171 172. 173 174 175 176 Figs. 165 to 176 Antero-dorsal views of embryos of Cryptobranchus alleghe-nieiisis in Stage 14, showing especially the segmentation of the neural plate. Cam-era drawings finished under the binocular, from preserved material. X 6. The earliest transverse grooves to cross the neural plate are numbered withRoman numerals in the order of appearance; in front of Groove I the transversegrooves are numbered with Arabic numerals consecutively without regard to theorder of appearance. Figure 166 is from the embryo photographed for figures 229and
. Journal of morphology. 169 170 171 172. 173 174 175 176 Figs. 165 to 176 Antero-dorsal views of embryos of Cryptobranchus alleghe-nieiisis in Stage 14, showing especially the segmentation of the neural plate. Cam-era drawings finished under the binocular, from preserved material. X 6. The earliest transverse grooves to cross the neural plate are numbered withRoman numerals in the order of appearance; in front of Groove I the transversegrooves are numbered with Arabic numerals consecutively without regard to theorder of appearance. Figure 166 is from the embryo photographed for figures 229and 230; figure 176 is from the embryo photographed for figures 231 and 232. 512 EMBRYOLOGY OF CRYPTOBRANCHUS 513 the open neural plate, in this region at least, are the divisionsbetween grooves—that is, the ridges rather than the depressions,for the former are in line with the body somites. If, as appearslikely, there is continuity between the structures of the anteriorand posterior regions of the cephalic plate, then the rule maybe exte
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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912
