Chemnitzia

Chemnitzia, a large genus of gasteropod molluscs, named in honour of a German conchologist of the 18th century. They have a slender, elongated, many-whorled shell, the whorls striated, a simple semi-oval aperture, and a horny operculum. There are many recent species scattered all over the world. No less than 180 fossil species have been described from the Lower Silurian upwards, but it is probable that different animals with similar shells are included under this one title.