This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...by Wright ('84 a, p. 372), as its fibers have very poorly developed medullary sheaths or none at all and my methods are not well adapted for them. The system as a whole, as in Gadus, deviates far from the peculiarly complex arrangement which is typical for teleosts, though it may evidently be derived from that ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...by Wright ('84 a, p. 372), as its fibers have very poorly developed medullary sheaths or none at all and my methods are not well adapted for them. The system as a whole, as in Gadus, deviates far from the peculiarly complex arrangement which is typical for teleosts, though it may evidently be derived from that arrangement. The sympathetic ganglionated chain of the trunk runs close to the centra of the vertebrae and so far as examined (viz. in the most cephalic spinal segments) contains ganglion cells quite uniformly scattered through it. Under the caudal end of the basi-occipital the ganglion cells disappear, to be followed farther cephalad by a large ganglion. The chain meanwhile approaches the median line and at the level of the vagus foramen meets the chain of the opposite side in a large unpaired ganglion. This ganglion bifurcates cephalad and the chains of the two sides rapidly separate, becoming non-ganglionated, and continue cephalad, under the basi-occipital mesially of the X and IX ganglia and separated from them by a big vessel. The non-ganglionated sympathetic cord continues forward along the outer wall of the cranium cephalad of the IX ganglion, maintaining the same relation to the IX nerve until that nerve enters the first gill. At that level a long narrow ganglion appears in the chain. This ganglion appears close behind the point of exit of the hyomandibular trunk from its foramen and it communicates with this nerve and with the r. palatinus posterior. Unlike most other vertebrates, the sympathetic ganglionated chain does not touch directly either the vagus or the glossopharyngeus nerves at any point. The sympathetic chain enters the trigemino-facial ganglionic complex with the hyomandibular trunk, and I was not able to trace its entire course...
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