. The elasmobranch fishes . 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

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