Tritia cuvierii: Habitat: it lives in low depths on muddy bottoms in the presence of Cymodocea nodosa and Caulerpa prolifera. Distribution: common all over the Mediterranean.
Notes: it is a really changeable species so that it has not yet a quite defined systematic position and it has a remarkable number of synonyms. Shell ovoid in form, turricolate, with about 14 axial ribs straight, solid, rounded, crossed by spiral furrows. Deep suture. Aper-ture oval in form, eolumellar fold wide and oblique, columellar margin expanded, lip thickened with 6 labial small teeth. In the recent Moreno & Templado's work (1995) it was designated the neotype of this species which is compared with N. unifasciatus. pointing out the differences not only due to the protoconch paucispiral in form (about 1.5 whorls) in cuvierii really different from unifasciatus one, which is slimmer and sharp (one whorl and three quarters of spiral), but also due to radula and to the egg capsules. Among the most similar species there are N. incrassatus and N. pygmaeus too, from which mainly it differs since it is bigger in sizes, it has whorls less convex and a different sculpture (spirally broader in both species). Usually on a ground dirty white in colour there are evident brown spiral little lines interrupted, in several strength and length. The adult specimens average measures are around 12-15 mm in height.