Reproduction in British zoanthids, and an unusual process in Parazoanthus anguicomus

Abstract
Specimens of three zoanthid species, Epizoanthus couchii, Parazoanthus anguicomus and P. axinellae were sectioned. All were gonochoric, with gametes developing during summer. Oocytes in P. anguicomus originate in a single-layered ribbon down the perfect septa, but the ribbon becomes moniliform as, at regular intervals, it folds laterally into lens-shaped nodes, packed with oocytes, doubling polyp fecundity.

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