1911 Encyclopædia Britannica/Membranelle

MEMBRANELLE, an organ in Ciliate Infusoria (q.v.), a flattened assemblage of adherent cilia, like the plates of Ctenophora (q.v.): such are arranged in a series in the adoral wreath of the Heterothrichaceae Oligotrichaceae and Hypotrichaceae and constitute the posterior girdle of Peritricha.