The elasmobranch fishes . elasmobranchfish03dani Year: 1934 Fig. 227. Cephalic canals and ampullae of Lorenzini, Heptanclms maculaUis. (G. L. TIanner, orig.) A. Dorsal view. B. Ventral view. cc, suprateniporal canal; , endolymphatic duct; lime, hyomandibular canal; iha., inner buccal ampullae; ioc, infraorbital canal; isa., infraspiracular ampullae; IL, lateral line; mg., mandibular groove; mpo., pit organs in gular line (gl.) ] , nasal aperture; oba.^'-, outer buccal and posterior outer buccal ampullae; soa., supraophthalmic ampullae; soc, supraorbital canal; sp., spiracle.

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