collected the specimens from the west coast of India. Looks close to Cerithium zonatum???? confirmation required. Shell size 8-11 mm, samples worn out a bit and collected from beach wash.
Certainly Cerithium zonatum ... but I suggest the determination of C. zonatum (complex). In fact, as in the case of other polytypic species, desirable genetic studies may identify various sympatric or allopatric species , morphologically similar to each other. These two works can help you.