. The Journal of comparative neurology and psychology. FiG. 39. Pig embryo, 17 mm. Median sagittal section reconstructed fromseveral sections. The outline of the hemisphere lateral to the median planeis shown in dotted lines, x 12%. row and internal ridge) between the diencephalon and the telen-cephalon. By the stage mentioned the cerebral vesicle is sufficientlyexpanded to push back past the boundary line. In the angle betweenthe vesicle and the diencephalon chorioid plexus pushinginto the lateral ventricle. It appears as a folding of the anteriorwall or limb of the velum transver


. The Journal of comparative neurology and psychology. FiG. 39. Pig embryo, 17 mm. Median sagittal section reconstructed fromseveral sections. The outline of the hemisphere lateral to the median planeis shown in dotted lines, x 12%. row and internal ridge) between the diencephalon and the telen-cephalon. By the stage mentioned the cerebral vesicle is sufficientlyexpanded to push back past the boundary line. In the angle betweenthe vesicle and the diencephalon chorioid plexus pushinginto the lateral ventricle. It appears as a folding of the anteriorwall or limb of the velum transversum and its lateral prolongation. 502 Journal of Comparative Neurology and Psychology. In this way appears the chorioid fissure whose further history neednot be traced. Near the median plane the plexus appears as a foldprojecting into the interventricular foramen and separated from the. Fig, 40. A parasagittal section from the embryo diuwu in Fig. 39.


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