Shell small, white, elevated, oval, thin, the margin rests entirely on a plane surface; front slope the largest, convex, side slopes irregularly convex, being slightly compressed at some distance from the apex, posterior slope slightly concave, apex blunt, placed at about 2/3 of the total length; the nucleus wanting, by a strong erosion of the apex. Sculpture consisting of irregular concentric rugosities or wrinkles, generally more distant from each other towards the apex, more crowded towards the margin, with a tendency to form lamellae; on some parts the upper side of the rugosities has coarse, short, riblike radiant striae, wanting in other places, perhaps by erosion. Inside smooth. Long. 6 mm, lat. 4,5 mm, alt. 2,75 mm.

The characters of the shell, as well as the external characters of the animal, agreed sufficiently with those of the genus Cocculina, but the radula is quite different. The rhachidian tooth (R) is elongate with convex sides, it has no reflected cusp, the upper margin being only irregularly waved, near the base an oval spot seems to be thickened, the first lateral tooth (1) is triangular, also without distinct cusp, but with a reflected or thickened upper margin, followed by three laterals (2, 3, 4), which are little different from each other, with a winged body, having the appearance of being turned outwards, the cusp standing at the distal side; their cusps are simple, the next lateral (5) has a quadrate body with a thickened stalk at its median line, and a cusp consisting of a sharp tooth at the proximal side, and a wing-like part on the distal side, with a slightly denticulate margin. Of the numerous uncini (U), the proximal ones, which are the largest, have simple cusps, while those placed more outwards have small denticles.
This species may be at once distinguished from P. granulata, by its very characteristic sculpture, it is a much higher shell; the radulae though being very similar in general construction, are sufficiently distinct.

Indonesia