Shell imperforate, oval-conic, solid, thick ; spire conical, whorls four and a-half, suture canaliculate by reason of the approximation of the infra- and suprasutural line. Aperture rounded, oblique; outer margin lirate, basal margin tuberculate. Columella concave, its margin sharp and nearly straight, furnished with a sharp tooth at the base succeeded by a deep basal notch ; the first tubercle on the basal margin is equal in size to the columellar denticle. Ornament of strong spiral ribs decussated by less elevated oblique ribs, which cut the interstices into rhombic pits ; at the intersections the spiral ribs are subnodulose. On the penultimate whorl there are three line, the posterior one of which is much smaller than the others ; the latter by their prominence give the whorl a biangulate section. The body-whorl, the convexity of which is only slightly interrupted, has six lirae, of the three in front of the periphery the posterior one is nearly as prominent as the peripheral one. Colour white, with spots of reddish-brown on the line, grouped in nearly axial lines across the anterior-half of the penultimate whorl, and across the body-whorl to its base. Dimensions: Height, 4mm; diameter, 3,25 mm.

In its clathrate ornament, elevated spire, and biangulated whorls, this new species resembles E. angulatus. Pease, E. pauperculus, Lischke, E. scrobicidatus, Souverbie, but differs from them inter alia by its unidentate columella. E. instrictus, Gould, may perhaps approach nearer, but the Australian shell has fewer line, and the transverse ornament is closer and finer; and though the mouth-aperture is similar, yet the Polynesian shell is deeply umbilicate.

Western Australia