. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 124 SMELL, TASTE, ALLIED SENSES. In the fishes the nerves chiefly concerned are the vagus, the glossopharyngeal and the facial. The taste-buds of the gill region are supplied by the vagus and the glosso- pharyngeal. Those that are in the mouth proper or are on the exterior of the body are innervated by the facial nerve. Consequently in the catfish (See Fig. 28), in which the whole outer skin is provided with taste-buds, this nerve is enormously developed and sends large branches to the barbels and an exte
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. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 124 SMELL, TASTE, ALLIED SENSES. In the fishes the nerves chiefly concerned are the vagus, the glossopharyngeal and the facial. The taste-buds of the gill region are supplied by the vagus and the glosso- pharyngeal. Those that are in the mouth proper or are on the exterior of the body are innervated by the facial nerve. Consequently in the catfish (See Fig. 28), in which the whole outer skin is provided with taste-buds, this nerve is enormously developed and sends large branches to the barbels and an exten- sive recurrent branch to the flanks of the bod)^ (Herrick, 1903). In mammals, includ- ing man, the innervation of the taste-buds is not upon so simple a plan as in fishes. In these higher vertebrates gustatory fibers may possibly be contained in four of the cranial nerves, the vagus, the glosso- pharyngeal, the facial, and the trigeminal. The distribution of these nerves in the human tongue has been worked out by Zander (1897). Certain parts of the vagus are distributed to the larynx and to the epiglottis as well as to the most posterior part of the tongue itself and innervate very probably the taste-buds of these re- gions (Fig. 34). The glossopharyngeal supplies the pos- terior third of the tongue including the foliate and vallate papillag, for, as was first shown by von Vintschgau and Honigschmied (1876), when the ninth nerve is cut the taste-buds of these parts soon degenerate and disappear. Although the correctness of this observation was denied Fig. 33.—Golgi preparations of the taste- budR of the common European barbel show* ing cells and nerve-fibera. After von Lenhoss^k, 1893 a, Fig. 2.. 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 work.. Parker, George Howard, 1864-1955. Philadelphia ; London : J.