« Shell globose with slender oval outlineconstricted anteriorly and posteriorly, with slightly and evenlyrounded sides. Spire abruptly sunk within an evident and deepapical umbilicus. Very narrow umbilical chink at the base. Juvenileshells less slender than adult ones. Aperture well rising above lastwhorl, columellar callus straight or slightly curved, weakly thick-ened and expanded, but usually with no fold or tooth. Fresh shellsshiny. The colour (examined on empty shells) varies from whitish(with or without a pale to intense yellowish band on the middle) tobrownish- or greenish-yellow, mottled or speckled, and with acentral dark band between two paler bands. Several shells mayhave two thin and irregular darker lines bordering the central band.Sculpture of many close-set spiral lines on the last whorl, shallowbut clearly evident, and of more or less marked growth lines. » – Crocetta, Poursanidis & Tringali: “Biodiversity of sea slugs and shelled relatives (Mollusca: Gastropoda) of the Cretan Archipelago”, Quaternary International vol.30, 2015, p.9.