. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 302 ANATOMY OF VERTEBEATES. fig. 196, h: it escapes by the foramen or anterior notch of the alisphenoid, in advance of the fifth nerve. This nerve, the trigeminal, enormous in all Fishes, from the Lancelet to the Lepidosiren, rises, often by two or more roots, from the restiform, or from the anterior angle between the olivary and restiform tracts ; in some fishes from a special ganglion or enlarge- ment of that part of the medulla oblongata, as in the Herring, fig. 184, i: in a few (Conger, Lump-fish) by a smaller origin
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 302 ANATOMY OF VERTEBEATES. fig. 196, h: it escapes by the foramen or anterior notch of the alisphenoid, in advance of the fifth nerve. This nerve, the trigeminal, enormous in all Fishes, from the Lancelet to the Lepidosiren, rises, often by two or more roots, from the restiform, or from the anterior angle between the olivary and restiform tracts ; in some fishes from a special ganglion or enlarge- ment of that part of the medulla oblongata, as in the Herring, fig. 184, i: in a few (Conger, Lump-fish) by a smaller origin resolved into several roots. The trigeminus shows well its spinal (myelonal) character in Fishes, only its double root is more deeply buried in the medulla oblongata. In the Cod, fig. 201, the non-ganglionic portion is shown at i, the roots of the ganglionic portion at 2, 2. On the left side the non-ganglionic portion is separated and turned back: on the right side its divisions are seen accompanying the first, a, second, b, and third, c, branches of the trigeminal. The fourth branch, d, is also composed of both portions of the nerve: the fifth branch, e, is exclusively from the ganglionic portion. The trigeminal is in close contact with tlie acoustic nerve, at their 202. Brain ;uKl flfUi nerves iif the Ray. CO'III. origins. In Cottus, Blennius, Cubitis, and I^aiciscus, the ganglionic or dorsal roots recede from the ventral ones, as they penetrate the medullary substance. The non-ganglionic roots in the Blcnny join the facial and glossopharyngeal. Of the five roots of the trigeminal in the Sturgeon, the first, second, and fourth form a. 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 Owen, Richard, 1804-1892; Cornell University. College of Veterinary Medicine. Flower-Sprecher Veterinary Library. fmo. London
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