Each whorl is covered between the sutures with a layer of matter, which assumes at the base a chestnut color.

This layer is much thicker upon the body whorl, and is continued, enlarging itself, to the left lip, where it forms a large semicircular callosity, of a deep chestnut color, bordered with white.

Each of the whorls of the spire is likewise separated from the others by a fawn-colored line, which is delineated a little below each suture.

The aperture is ovate, of a pale fawn-color, dilated towards the middle, strongly emarginated at its base.

From its lower part, a stria stretches out, which is directed obliquely upon the back of the shell, to its termination at the anterior angle of the right lip, which is sharp.