« Marine prosobranchs that have small or minute depressed shells, which are transparent while the animal is alive. The aperture is usually oblique, rounded, and without a terminal varix. There are usually one to three postlarval whorls which may be smooth or sculptured. » – Rubio & Rolán: “The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas”, Iberus vol.29, Barcelona, p.66: subfam. Vitrinellinae.
 

« Very small, circular, nearly flat-spired, with an exceedingly wide and open umbilicus. » – J. G. Jeffreys: British conchology vol.III, London 1865, p.315.