. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 237 SPINAL COED The spinal cord extends from the })rain practically to the tip of the tail. Unlike that in the higher forms it does not possess marked pectoral and pelvic swell- ings produced by the i)assage of the nerve bundles to the limbs. In its external aspect and in its internal structure the cord may be spoken of as a simplifi- cation of the medulla. The place occupied in the medulla by the nucleus of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for read

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. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 237 SPINAL COED The spinal cord extends from the })rain practically to the tip of the tail. Unlike that in the higher forms it does not possess marked pectoral and pelvic swell- ings produced by the i)assage of the nerve bundles to the limbs. In its external aspect and in its internal structure the cord may be spoken of as a simplifi- cation of the medulla. The place occupied in the medulla by the nucleus of the. 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 Daniel, J. Frank (John Franklin), 1873-1942. Berkeley,Calif. , University of California press

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