The size of an adult shell varies between 24 mm and 52 mm. The shell is bulbous, with a convex, striate
spire. The
body whorl is striate, the striae rounded, usually obsolete above, granular below, olive, chestnut-, chocolate- or pink-brown, variously marbled and flecked with white, often faintly white-banded below the middle. In the variety
nigropunctatus, the shell is colored as above and encircled by series of chocolate-colored dots. ==Distribution==