. On the anatomy of vertebrates [electronic resource] . m theLancelot to the Lepidosiren, rises, often by two or more roots, fromthe restiform, or from the anterior angle between the olivary andrestiform tracts ; in some fishes from a special ganglion or enlarge-ment of that part of the medulla oblongata, as in the Herring, , i: in a few (Conger, Lump-fish) by a smaller origin resolvedinto several roots. The trigeminus shows well its spinal (myclonal)character in Fishes, only its double root is more deeply buried inthe medulla oblongata. In the Cod, fig. 201, the non-ganglionicportion i
. On the anatomy of vertebrates [electronic resource] . m theLancelot to the Lepidosiren, rises, often by two or more roots, fromthe restiform, or from the anterior angle between the olivary andrestiform tracts ; in some fishes from a special ganglion or enlarge-ment of that part of the medulla oblongata, as in the Herring, , i: in a few (Conger, Lump-fish) by a smaller origin resolvedinto several roots. The trigeminus shows well its spinal (myclonal)character in Fishes, only its double root is more deeply buried inthe medulla oblongata. In the Cod, fig. 201, the non-ganglionicportion is shown at l, the roots of the ganglionic portion at 2, the left side the non-ganglionic portion is separated and turnedback: on the right side its divisions are seen accompanying thefirst, a, second, b, and third, c, branches of the trigeminal. Thefourth branch, d, is also composed of both portions of the nerve:the fifth branch, e, is exclusively from the ganglionic trigeminal is in close contact with the acoustic nerve, at their 202. Brain and fifth nerves of tlie Ray. covin. origins. In Coitus, Blennius, Cobitis, and Leuciscus, the ganglionicor dorsal roots recede from the ventral ones, as they penetrate themedullary substance. The non-ganglionic roots in the Blennyjoin the facial and glossopharyngeal. Of the five roots of thetrigeminal in the Sturgeon, the first, second, and fourth form a NEKVES OF FISHES. 303 ganglion (Gasserianum). In the Skate (Raia) the roots of thetwo ganglionic portions, fig. 202, a, b, of the trigeminal, arise fromthe restiform tract: the non-ganglionic part, c, from the folded orfimbriate part of the tract. A pin is passed between the secondganglionic and the non-ganglionic portion ; the latter, c, being re-flected back on the left side of the figure; on the right side thenon-ganglionic branches, e, f are left, accompanying the corre-sponding branches of the ganglionic portion, a, e, f The acousticnerve, 7, comes off as a branch of
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Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes
