. Bulletin of the scientific laboratories of Denison University. Art. II.] Herrick, Gustatory Paths m Fishes. 83 ial consists of serial sections of ten adult brains cut in the three conventional planes and stained with Delafield's haematoxylin and by the methods of Weigert and Weigert-Pal, together with serial sections of about lOO younger brains prepared by the method of Golgi and cut in various planes. The vagal lobe of the cat fish is essentially similar to that of most other teleosts. The general relations as seen in tran- sections stained by Delafield's haematoxylin are shown in Fig. 26.
. Bulletin of the scientific laboratories of Denison University. Art. II.] Herrick, Gustatory Paths m Fishes. 83 ial consists of serial sections of ten adult brains cut in the three conventional planes and stained with Delafield's haematoxylin and by the methods of Weigert and Weigert-Pal, together with serial sections of about lOO younger brains prepared by the method of Golgi and cut in various planes. The vagal lobe of the cat fish is essentially similar to that of most other teleosts. The general relations as seen in tran- sections stained by Delafield's haematoxylin are shown in Fig. 26. The lobe is crowded with numerous small nerve cells, dors- sec. neurones intrinsic neurones superfic- root of X lat. sec. neurones deep root of X nuc- intermedius X spinal V tract desc. sec. VII tract asc. sec. gust, tract motor root of X ventral cornu. Fig. 26. Transverse section through the vagal lobes of a large adult of Ictalurus punctatus (Raf.). Drawn from a haematoxylin preparation. X 16. /"./.;«., fasciculus longitudinalis medialis ; , nucleus ambiguus ; ^., substantia reticularis grisea. which take up a very pale stain in haematoxylin. Most of these intrinsic cells are neurones of Golgi's type II, whose processes do not extend beyond the lobe. Along the dorsal and lateral borders of the lobe is a layer containing larger cells whose nuclei stain very little in haematoxylin and whose cytoplasm practically not at all. The axones of these cells con- stitute the chief sensory conduction paths from the vagal lobe to other parts of the brain, and I shall term them the dorsal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Denison University; Denison Scientific Association. Granville, Ohio : [The University]
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