Nemertina :: Nemertina (n. pl.) An order of helminths usually having a long, slender, smooth, often bright-colored body, covered with minute vibrating cilia; -- called also Nemertea, Nemertida, and Rhynchocoela..
Schizonemertea :: Schizonemertea (n. pl.) A group of nemerteans comprising those having a deep slit along each side of the head. See Illust. in Appendix.