Lacuna vincta

Lacuna cf. vincta (Montagu, 1803) (Fig. 7F 1-F 3) cf. Turbo vinctus Montagu, 1803: 307. cf. Lacuna divaricata – Harmer 1921: 668, pl. 53, fig. 30. MATERIAL AND DIMENSIONS. — Maximum height 2.7 mm (incomplete), width 2.1 mm.— RGM.1364982 (1), leg. ACJ; RGM.1365184 (2), leg. ACJ. SPECIES CHARACTERISATION. — Small, ovate-conical shell with subobsolete spiral threads. Four teleoconch flat whorls. Last whorl is 59% of the total height. Prosocline growth-lines. Ovate aperture, with open umbilicus. DISTRIBUTION. — Selsoif, NW France (this paper).Today L. vincta is found in boreal regions of western and eastern Atlantic Ocean with its southern distribution recorded in Brittany (Smith 1973) where it is common on algae such as Fucus. REMARKS We have only badly damaged material, whose attribution is uncertain. Nevertheless, the flat-sided whorl profile and subobsolete spiral threads suggest it concerns this species.