. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 207 considerably from the condition seen in Heptanchus. It is formed by an anterior vessel on the olfactory bulb which receives a branch from the olfac- tory lobe, a median branch from the ventral olfactory and diencephalic areas, and a posterior vein which in the middorsal line joins a similar vein from the opposite side as the mesencephalic vein. In other words, the first branch of. fo. VII po Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 207 considerably from the condition seen in Heptanchus. It is formed by an anterior vessel on the olfactory bulb which receives a branch from the olfac- tory lobe, a median branch from the ventral olfactory and diencephalic areas, and a posterior vein which in the middorsal line joins a similar vein from the opposite side as the mesencephalic vein. In other words, the first branch of. fo. VII po 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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