turbellaria
Tur`bel*la"ri*a, n.; pl. Etym: [NL., dim. fr. L. turbo a whirling.] (Zoöl.) Defn: An extensive group of worms which have the body covered externally with vibrating cilia. It includes the Rhabdocoela and Dendrocoela. Formerly, the nemerteans were also included in this group.