Souleyet, 1852
Shell large (to 6-7 mm), colorless or light yellowish. Spire of 4 and 1/2 whorls, with shallow suture. On the underside of the spire, a low and indistinct ridge marks the line where, on the following whorl, the keel develops. Area between this ridge and the umbilicus rounded like other whorls. Tiny tubercula scattered on the spire surface, and rarely on the first whorl of the teleoconch; sometimes forming irregular, spiral lines. Radula large, with a growth angle of about 16°. Number of tooth rows limited to about 60. Lateral teeth monocuspid.
See the family Atlantidae for a discussion of the species groups.