Eulithidium substriatum
Eulithidium substriatum is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.
Description
The form of the shell is as in Phasianella variegata Lamarck, 1822 but the whorls, except the nuclear whorl, are verydelicately striate, the body whorl with about ten striae.