. The elasmobranch fishes. Chondrichthyes. Fig. 249. Eeceptor cells and gland cells in an ampulla of Lorenzini. (From Dotterweich.) af., afferent nerve; ef., efferent nerve ; <;., gland cells; s., sensory Fig. 250. Pit organ, Haia l)atis. (From Ewart and Mitchell.) first dorsal fin. Others occur along the hyomandilndar and the infraorbital canals in the head. Ewart and Mitchell (1891) have given a section through a pit organ of the ray (fig. 250) which shows it to be not unlike a taste bud. The narrow neck leads to a group of sense cells which form a ball. Each of the sense cells is

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. The elasmobranch fishes. Chondrichthyes. Fig. 249. Eeceptor cells and gland cells in an ampulla of Lorenzini. (From Dotterweich.) af., afferent nerve; ef., efferent nerve ; <;., gland cells; s., sensory Fig. 250. Pit organ, Haia l)atis. (From Ewart and Mitchell.) first dorsal fin. Others occur along the hyomandilndar and the infraorbital canals in the head. Ewart and Mitchell (1891) have given a section through a pit organ of the ray (fig. 250) which shows it to be not unlike a taste bud. The narrow neck leads to a group of sense cells which form a ball. Each of the sense cells is long. 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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