Shell rather large, up to 57 mm. (2,25 inches) in length, broadly ovate, slightly narrowed in front, and moderately elevated, with rounded slopes, and a subcentral nucleus; margin smooth to very weakly crenulated. Sculpture of dense, crisp, radial riblets, rendered granulose by concentric growth lines; riblets varying between 120 and 180, with about 20 of them slightly stronger than the rest, and in some examples there is a subobsolete indication of the "9-fold" state, reminiscent of the enneagona subspecies of radiata. Colour of exterior, pale brownish-buff, with eleven broad radiate bands of deep reddish-brown; internally the spatula is chestnut-brown, often clouded over with pale fawn callus, and surrounding the spatula is a zone of yellow, merging with silver towards the margin, the external brown pattern showing through; juveniles have a sparse pattern of radiate reddish-brown dashes on a yellowish ground. Length 35-57 mm; Width 29-47 mm; Height: 12-20 mm.

This species seems to be nearest to livescens Reeve, 1855 (formerly cernica H. Adams, 1869) from Mauritius which also has 9-10 broad radiate bands of dark reddish brown, upon a yellowish ground, as well as a moderate development of the 9-folds. P. livescens, however, is more elongately ovate, and flatter, with the apex at about the anterior third.

Gulf of Oman to Pakistan.