. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 235 It is so in LainiKi, Scoliodon (fig. 211a), Galeus, Tvijcjon, and Myliobaiis (fig. 212). In all these the surface is thrown into numerous irregular folds or convolntions. The myelenc'ei)halon (medulla) {nied., figs. 211-21:]) when seen in dorsal view is shaped like the letter Y, the anterior limits of the Y being made by the restiform bodies, corpora restiforme {cr.). These in many of the simpler types of sharks, such for example as Scymnus, appear as prominent structures. In others the corpora restiforme are entirely hidd

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. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 235 It is so in LainiKi, Scoliodon (fig. 211a), Galeus, Tvijcjon, and Myliobaiis (fig. 212). In all these the surface is thrown into numerous irregular folds or convolntions. The myelenc'ei)halon (medulla) {nied., figs. 211-21:]) when seen in dorsal view is shaped like the letter Y, the anterior limits of the Y being made by the restiform bodies, corpora restiforme {cr.). These in many of the simpler types of sharks, such for example as Scymnus, appear as prominent structures. In others the corpora restiforme are entirely hidden by the enlarged cerebellum (Myliohafis, fig. 212). Both in dorsal and in ventral view the medulla is conical. 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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