Ventricose Demoulia

The shell size varies between 17 mm and 27 mm. The ovate shell is slightly cylindrical and is blunted at its summit. The short spire is flattened. It is composed of five whorls. The two last whorls are much more swollen, and covered upon their whole surface with very fine and very close transverse striae. The suture is very apparent, and a little canaliculated. The white aperture is ovate, narrowed at its upper part and dilated inferiorly. The outer lip is thin and is ornamented interiorly with numerous transverse striae. The smooth columella is arcuated at its base and is covered throughout its whole length with the inner lip, the base of which is a little thicker. The surface of this shell is reddish or violet-colored, with wide, reddish spots. It is ornamented at the upper part of the whorls, and along the suture, with a white band, alternating with irregular deeper spots.