« Shell comparatively long and slender, slightly curved, glossy, pellucid, sculptured with numerous but obscure lines of growth; the diameter increases very slightly and gradually towards the mouth; septum much produced in the form of a cone with slightly concave sides, ending in a fine point, and not deviating to either side; mouth not thickened by an annular rib. » – G. W. Chaster: “Some new marine mollusca from Tangier”, Journal of Malacology vol.V(1), London 1896, p.2.
5-10m deep, Ceuta. 2,3mm.
The drawing shows the very weak and thin commarginal ribbing, impossible to detect without strong magnification.
In fact, one has to consider this species as “smooth” in the determination key given by van Aarsten in Basteria 41.