Shell solid, white to light ivory in color and imperforate. Axial sculpture usually of strong ribs, but in some groups these may be reduced to small crenulations at the suture. Species in certain groups may be angulated or nodulose. Basal ridge present or absent depending on the group. Spiral sculpture usually of exceedingly fine incised threads which may or may not be finely pitted. This microscopic sculpture appears to be invested in a very thin outer layer of softer lime which is quickly lost in worn specimens. Operculum thin, corneous, paucispiral and littorinoid in shape. Shells solid, white and imperforate. Axial sculpture consisting of strong ribs. Basal ridge well developed. Spiral sculpture of exceedingly fine pitted threads. These small pits vary in number and size and are present only in fresh and unworn specimens.