The Collaborative International Dictionary
Scolecida
Scolecida \Sco*le"ci*da\ (? or ?), n. pl. [NL. See Scolex.] (Zo["o]l.) Same as Helminthes.
Wikipedia
Scolecida
Scolecida is an infraclass of polychaete worms. Scolecids are mostly unselective deposit feeders on marine detritus.