Alycaeus liratulus (Preston, 1907)  

Preston (1907) original descriptions on Alycaeus (Pincerna) liratula – “Shell conical, pale yellowish horn colour; whorls 4½, convex; the first whorl and a half smooth, the remaining whorls sculptured with fine spiral lirae, and somewhat coarse transverse ribs which are much more numerous and closely set on the body-whorl; last whorl constricted about two and a half millimeters from the aperture and destitute of transverse ribs in the constricted area; suture deeply impressed; aperture circular; peristome continuous, double, and reflexed outwards; umbilicus narrow and deep, partly concealed by the reflexed peristome, which, owing to a notch or depression at this point, is expanded outwards and downwards; operculum horny, convex below, concave above, bearing in the centre of the upper surface a hollow cup-shaped protuberance, the margin of which is slightly reflexed outwards.”