Lunella coronata (Gmelin), is a species widely distributed and commonly found along the coast of China. A total of 1,438 specimens colleeted from 48 different localities along the coast during the years 1950-1964 were studied. All these specimens are hereby grouped under six samples, viz. I-VI(fig. 1)aceording to the localities of collection, the latitudes where they are distributed and their relative similarity of aggregate characteristics. Fourteen different morphological parts of the shell and radula of each specimens were measured, and the figures thus obtained were arranged and treated in the way of biological statistics as are shown in tables 1-8 and figures 2-6. In general, there are five common characteristics and no significant differences in morphological character can be traced. They are: operculum index (operculum breadth×100/operculum length), index of operculum nucleus deviation (the shortest distance between operculum nucleus and its edge×100/operculum length), index of radula breadth (breadth of radula×100/shell height), index of the distance between two radula rows (the distance between two rows of radula×100/shell height),and the index of the distance between two cusps of central tooth (the distance between two cusps of central tooth×100/shell height). However, there are nine charaeteristies from which significant differences in morphological character are noticeable. They are: spire index (shell height ×100/shell breadth) index of body whorl (body whorl height×100/shell height), size of umbilicus, size of tubercle of the Ist and 5th row, index of operculum length (operculum length×100/shell height), index of operculum breadth (operculum breadth×100/ shell height), index of radula length (radula length×100/shell height)and number of rows of radula.