Shell of medium size, conical, yellowish white. Protoconch relatively large, white and glassy, of 1,5 whorls, nucleus large, the next whorl swollen, sculpture appearing gradually on the 3rd whorl. Mature whorls 6, short, rounded, sutures impressed. Sculpture strongly clathrate, axials stronger than the spirals, well elevated, rising at the intersections into small tubercles. The axials number 16 on the penultimate and 18 on the body whorl, and are continuous from whorl to whorl; the spirals are 4 on the penultimate and 8 on the body whorl, the 2 lowest smooth and enlarged, replacing the basal fold. Aperture ovate and very oblique, well thrust forward anteriorly, outer margin not extended, slightly thickened internally and with a broad external varix. Columella sinus deep, adjacent to the anterior margin. Length 4-8 mm.
Localities.—Facing L, Port Curtis (H. L. Kesteven), holotype; Bowen (J. Laseron), common.
Remarks.—In its general characters this species is almost identical with P. allanae, from which it is almost indistinguishable. It is, however, somewhat larger, but the main and definite difference is in the protoconch.