title: The organization of ampullary sense organs in the electric fish, Gymnarchus niloticus.
abstract: Three types (A, B, and C) of ampullary sense organs occur in the skin of Gymnarchus niloticus. In type A the ampulla is connected to the surface of the skin by an open duct whereas in B and C organs it is closed, though overlain by specialized epidermal cells. In each case the receptor cell surface in contact with the ampullary lumen bears microvilli; these are more highly developed in B and C organs than in type A. Fine structural observations are consistent with the view that the organs are electric receptors of three different types.
authors.affiliation: Department of Zoology, Cambridge.
authors.forename: A M
authors.initials: AM
authors.lastname: Mullinger