Journal of comparative neurology . Fig. 22 Early flexure stage (No. 550, section 1-2-14). X 200 The plane ofsection of this figure is illustrated in figure 16. It illustrates a longitudinal sec-tion of the medulla oblongata, in which the entrance of the trigeminal root ap-pears (). There is a short ascending trigeminal tract {) and adescending trigeminal tract {) which reaches to the level of the middleof the auditory vesicle () The ventricular pits opposite the entrance ofthe roots are conspicuous features of such a section. Figs. 23 to 28 Early flexure st

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Journal of comparative neurology . Fig. 22 Early flexure stage (No. 550, section 1-2-14). X 200 The plane ofsection of this figure is illustrated in figure 16. It illustrates a longitudinal sec-tion of the medulla oblongata, in which the entrance of the trigeminal root ap-pears (). There is a short ascending trigeminal tract {) and adescending trigeminal tract {) which reaches to the level of the middleof the auditory vesicle () The ventricular pits opposite the entrance ofthe roots are conspicuous features of such a section. Figs. 23 to 28 Early flexure state (No. 473, sections 1-5-14 to 19). X figures are from six successive sections of the series from which figure 2was made, and show the relations of the root bundles of the seventh and eighth THE NERVOUS SYSTEM OF AMPHIBIA 317

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Keywords: ., bookauthorw, bookcentury1900, bookdecade1910, booksubjectmedicine