Shell small, thin, auriform, white, keeled and widely umbilicate. Whorls 2,5, very rapidly increasing, including a small smooth protoconch of one whorl, obliquely tilted, the apex immersed. Spire less than half height of aperture. Sculpture consisting of a few equispaced rather sharp-crested prominent spiral keels, three on the spire whorl and seven on the body whorl. The lower four keels do not encroach far over the base, the major portion of which is a wide gentle concavity leading to the actual umbilicus which is deep and about one-eighth the diameter of the shell. There is no axial sculpture apart from rather distant and somewhat irregular growth lines which show most pro¬minently in the basal concavity leading to the umbilicus. Aperture oblique, rhomboidal. Peristome thin, discontinuous. Inner lip deeply concave but somewhat flattened medially.
Height 1,5 mm.; diameter 2 mm. (Holotype). Habitat: OfT Three Kings Islands, St. 933, 260 m.
This resembles Tornus aupouria but is much more depressed and widely umbilicate.