Shell semioval in shape, with 2-3 rapidly-increasing whorls, and a very wide aperture; apertural margin with a short slit above the center, joined by a short slit band, which lacks upwardly-bent margins and the inner margin of which is callous.

Shell minute, subauriforrn, smooth. Apex submarginal, few whorls, the last very large ; a short slit on the outer lip above the periphery, bounded by a callus on the inner side. There is no operculum. Teeth of radula similar to those of Emarginula.
Hedley considers it as a member of the Fissurellidae in which development has been arrested ; the usual subsequent metamorphoses have. not been enacted and the larval characters have persisted in adult life.
The absence of an operculum removes it from the genus Scissurella, and the characters of the radula, which I have examined, show that it is nearly allied to Emarginula. The radula is asymmetrical.