. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SARGENT : THE OPTIC REFLEX APPARATUS OF VERTEBRATES. 219 (1) iierve'Cells with characteristic nerve-processes, (2) a nerve-net distributed through the whole area of the torus, and (3) ependymal cells. The " cellules nerveuses speciales " (compare Fig. L) are globular or pear-shaped, 10 to 14 micra in diameter, with a large nucleus, and are irregularly disposed through the whole space of the torus. As a rule there is but a single process from the cell, which at a short distance from the cell divides.
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SARGENT : THE OPTIC REFLEX APPARATUS OF VERTEBRATES. 219 (1) iierve'Cells with characteristic nerve-processes, (2) a nerve-net distributed through the whole area of the torus, and (3) ependymal cells. The " cellules nerveuses speciales " (compare Fig. L) are globular or pear-shaped, 10 to 14 micra in diameter, with a large nucleus, and are irregularly disposed through the whole space of the torus. As a rule there is but a single process from the cell, which at a short distance from the cell divides. One of these processes is "plus delicat et plus tenu," and may again divide. "II conserve un cours presque rectligne et . . se laisse suivre sur le longues portions vers la parti superieure et externe du torus, . . sur le point ofi le torus s'attache lateralement. Figure L. Tinea vulgaris. Diagrammatic transverse section of the torus longi- tudinalis and adjacent portion of the tectum of the riglit side. (Adapted from Sala's Figs. 1, 2, and 3.) For meaning of abhreviations, see Explanation of Plates, p. 257. avec le toit optique, . . ou il contribue a constituer un faisceau de fibres nerveuses qui, se continue lateralement dans le toit oj); This description corresponds with the fibres which collectively I have called the tractus toro-tectalis (compare Fig. L, trt. for. tcf.). According to Sala this tract in passing out of the torus into the tectum passes obliquely between the fibres of the dorsal decussation, " fibres commissurales des lobes optiques," and " plie brusquement a I'ex- terne et se dirige vers le toit optique, courant toujours sur un plan un pen supericur a celui sur lequel courent les fibres ; This fibre-tract from the torus to the tectum was first seen by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc
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