The shell in this genus is semiovular with a flat apertural plain. The apertural side is white and flattened. The aperture is continuous and the apertural lip is simple. The apertural margin is simple and breaks easily. There are no apertural teeth and there is no umbilicus. The apertural margin is white and slightly reflected in adult snails. The apertural lip extends upwards beyond the apex of the shell. The thickened and slightly out-turned apertural lip usually dark brown, rarely white. The apertural margin is white and usually with a white layer at the parietal side. The apertural face and peripheral keel, where the two faces meet, are imperforate.