Shell minute, thin, white, ovate, sculptured with strong oblique squarish radial cords and less conspicuous spiral threads. Whorls 3,25, including a minute flattened radially ribbed protoconch of 1,25 whorls. Spire about one-third height of aperture. The radials number sixteen on the last whorl and they extend from the suture to the minute umbilical chink except for the interruption of the fasciole girdle, which is sunken, with raised edges, and is situated above the middle of the whorls. The fasciole girdle commences at the close of the penultimate whorl. Slit deep, extending back over about one-third of the body whorl. There are four equispaced spiral threads between the fasciole girdle and the upper suture and nine below the girdle on the body whorl and base. Aperture oblique-oval. Peristome thin, continuous across parietal wall, broken only by the slit. Height 1,05 mm.; diameter 1,0 mm. (Holotype).

This species appears to be more nearly allied to the Tasmanian S. ornata, May, than to any of the New Zealand species.

New Zealand. Habitat: Off Three Kings Islands, St. 933, 260 m.