Cerion nipense spec. nov.
(Pl. 35, fig. 11)
Holotype. – Juan Díaz Beach, Nipe Bay, Mayarí, Oriente. C. G. Aguayo and J. A. García Castañeda's Collection. Poey Museum No. 13,221.
Description. – Shell large, narrowly umbilicate, cylindracal, diameter largest immediately below the spire. Spire not long, forming a 65-70 º angle. It has 10 convex whorls, more rounded in the whorl than in the column. Suture deep, denticulated because of the projections of the axial ribs. The apex of the cone forms an obtuse angle with the column. Nuclear whorls microscopically pointed, with very thin grooves, which turn into ribs in the post nuclear whorls. Post nuclear whorls axially ribbed, the first containing various little ribs, which separate in the following ones until reaching to 38-45 in the penultimate whorls. The ribs, which are strong, disappear little by little in the last whorl, thin axial lines only remain, which become again stronger below the peristome and the base, and they disappear in the umbilicus. Color white, with brown marbled appearance, with irregular wide axial bands and some brownish loosely spiral lines. Subquadrilateral aperture, reflected peristome, their sides attached by a little parietal callosity. Curved outer end, imperceptibly reaching the basal end; inner end almost at a right angle, connected to the basal by an obtuse angle. Short parietal tooth; small pleigne canine. Narrow umbilicus.