Shell pyramidal, with acute apex and flattened whorls, sculptured with 8 series of tubercles, the two upper ones dark brown, the third whitish. The last whorl with a further angular (white) and a basal (brown) tubercle series. The median row of tubercles smallest, and disappearing on the upper third of the shell, the 9 upper whorls carrying only 2 series of tubercles; protoconch (comprising 5 whorls) dark brown, its 2 apical whorls smooth, its lower ones sculptured with 2 spiral threads and close longitudinal folds, the 3 sequent whorls uniformly white - then the upper brown spiral line appears, and later on the second one. Canal brown with a thick basal cord. Whorls 14 including the 5-whorled protoconch. Dimensions: h. 6 mm., br. 2 mm, h. of mouth about 1,1 mm.

This new species is easily recognized by its dark brown apex, and sequent uniformly white portion, beneath which the whorls are banded with brown and white. There are 20 longitudinal tubercle series on the last whorl. HEDLEY in his “Studies of Australian Mollusca”, Pt. 7 gives the descriptions and figures of several forms of Triphora from Australia; the characteristic colouration of the present species distinguishes it from them all. SOWERBY describes and figures a Triphora fuscozonata from New Caledonia, with dark brown bands on each whorl; the gemlike nodules ... arranged in two prominent rows with a narrow intervening crenulated ridge; on the last whorl they are smaller and closer, forming six ridges. On the somewhat rough figure one observes that both the rows of brown tubercles extend up to the apex, for which reason the distinction of this species from the one described here seems to be determined.

Western Australia