Shell roundly-ovate, rather thin, smooth, glistening, of four and a-half whorls. Nucleus one turn and a-half, slightly mammillate, apex inserted, first whorl rather excentric, next half-whorl marked off from the first by a depressed scar; suture simple and distinct; distinguished from spire-whorls by its smoothness, but for minute sublenticular longitudinal striae, and by absence of ornament. Spire-whorls two, gradated, with a marked very slightly rounded angle, behind which the first turn is subconvex, becoming gradually less so, the second is subconcave, and in front of which both are slopingly subconcave ; very minutely longitudinally striated under the lens, best seen behind the angle, and still more minutely spirally incised. On the second spire-whorl are also erect reflected curved scales, at gradually increasing intervals, best seen behind the angle, and continuous anteriorly with slightly prominent subvaricose longi¬tudinal striae. Body-whorl ventricose, slightly excavated close to the suture, forming a slightly rounded angle, then uniformly sloping-convex ; surface divided into ten longitudinal areas by the remains of slightly projecting lips, which behind the angle form erect, rounded, slightly-reflected plates, the earlier ones more and more worn away ; the areas finely longitudinally and spirally incisedly striate. Aperture large, nearly planoconvex ; outer lip uniformly convex, simple, very slightly thickened out¬side, rather more so about two lines within, edge almost sharp ; posteriorly ascending for two lines, slightly reflected and pointed, and forming a marked notch at the suture. Columella slightly convex behind, nearly straight in the anterior half, excavated in the lower fifth. Inner lip distinct, smooth, with callus increasing in thickness from behind forward ; posteriorly it forms a short sinus with the ascending outer lip, then is applied spreading somewhat and uniformly over the bodywhorl; in the lower half with a free margin least marked where it crosses the varix of the notch, then slightly inflected and incurved to the extremity of the columella. Anterior notch distinct and everted and recurved.
Ornament, nucleus, and spire-whorls of a uniform salmon tint. The latter and the body-whorl closely dotted with small deep chestnut spots, their spiral diameter twice as great as their longitudinal, arranged in longitudinal series so that the dot of each is opposite the space in the next. The body-whorl has also two broad salmon-coloured spiral bands, one from the back of the aperture to a little above the middle of the lip, the other from a little above the middle of the aperture to the lower third of the lip. Just behind the remains of previous lips in these bands are crescents of dark chestnut, and similar crescents are found here and there on the body and spirewhorls close to the suture. Behind these bands is one narrower and less distinct, and another at and behind the angle ; one between the broad bands, and two in front of the lower one. Between all the bands are narrow indistinct whitish areas. The inner edge of the lip is white, with less distinct and narrower coloured areas corresponding with the bands outside. The throat is translucent, and reveals faintly the external dots and bands.

This new species cannot be confounded with any other form. The distant ribs and dotted ornament distinguish it at once.

Southern Australia.