By van Benthem Jutting (1952)
"shell short-cylindrical, lower than O. coronatum. White, somewhat shining and transparent. Last whorl broader than the penultimate one. First whorl smooth, subsequent ones ornamented with fine white distantly place vertical ribs, standing out wing-like away from the shell. In fresh specimens the ribs are most developed on the periphery of the two last whorls giving these a crown-like apperance. Between the ribs there is a fine spiral sculpture. Whorls 4, teh two first small and hardly projecting, the otehrs large and convex, especially the ultimate whorl, separated by a deep suture. In the type specimen there are 19 ribs on the last whorl, counting from the aperture to the spot where the deviating distal part of the last whorl touches the penultimate one. On the penultimate whorl the holotype has 22 ribs. About midway in the last whorl there is transverse constriction. After this the distal part of this whorl widens again towards the aperture, at the same time turning upward so that the aperture faces the sky. Umbilicus open, rather wide. Aperture round, horizontal, lying in one plane with the top of the shell. Peristome continuous, circualr or rounded-triangular. With double margin. operculum unknown."