Vitreolina  Vitreolina is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the Eulimidae family. This genus was first described by Monterosato in 1884. He proposed it as a section in the family Eulimidae for some of the Mediterranean species. It contains the small vitreous species without internal varices,  with curved spire and slightly obtuse apex. Species within the genus "Vitreolina" include: