. The elasmobranch fishes. Chondrichthyes. 232 THE ELASMOBRANCH FISHES although in it fusion is greater. From Heterodontus to Scoliodon (fig. 211a) a series of forms may be obtained, showing a progressive specialization to a condition in which practically no sign of right and left lobes remains. In the component parts of the telencephalon there is also great diversity. The median olfactory nucleus () produces very different effects depend- ing on the degree of its own development and also on the degree of fusion of the right and left telencephalic lobes. In Scymnus these nuclei constitute
. The elasmobranch fishes. Chondrichthyes. 232 THE ELASMOBRANCH FISHES although in it fusion is greater. From Heterodontus to Scoliodon (fig. 211a) a series of forms may be obtained, showing a progressive specialization to a condition in which practically no sign of right and left lobes remains. In the component parts of the telencephalon there is also great diversity. The median olfactory nucleus () produces very different effects depend- ing on the degree of its own development and also on the degree of fusion of the right and left telencephalic lobes. In Scymnus these nuclei constitute 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 Daniel, J. Frank (John Franklin), 1873-1942. Berkeley,Calif. , University of California press
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