. The Journal of comparative neurology and psychology. FiG. 3. Fig. 2. Squalus aeauthias, sliowiug the same as Fig. 1. Fig. 3. Squalus acanthias, showing the same as Fig. 1. a, h, c. three cells,parts of which are cut away In the section. ing to this root in selachians are so distinct from all other fibers thatthere can be no doubt that the processes of the large cells actuallybecome fibers of this root. The same has been clearly demonstratedin sections of the sturgeon ])rain not used for the previous study. The origin of the fibers has been seen in the toad and will be de-scribed in th
. The Journal of comparative neurology and psychology. FiG. 3. Fig. 2. Squalus aeauthias, sliowiug the same as Fig. 1. Fig. 3. Squalus acanthias, showing the same as Fig. 1. a, h, c. three cells,parts of which are cut away In the section. ing to this root in selachians are so distinct from all other fibers thatthere can be no doubt that the processes of the large cells actuallybecome fibers of this root. The same has been clearly demonstratedin sections of the sturgeon ])rain not used for the previous study. The origin of the fibers has been seen in the toad and will be de-scribed in the following section. In the rat, mouse and rabbit theyhave been studied in sections prepared by the Cajal and Eielschowskysilver methods, and it need only be said that the description by Cajalis confirmed (Figs. 4 and 5). 6o2 Journal of Comparative Neurology and Psychology. 2. The Position and Character of the Cells of Origin.—In allfishes and amphibians studied the cells of origin are located in thetectum mesencephali, the majority of them near th
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