Conical shell up to 10mm in length. The surface of the shell is smooth. It is white or cream in colour with pink lines which are often broken giving a chequered pattern. Occasionally a pure white specimen may be found.
- Shell surface marked with pink rays
- Head scar is unpigmented or a V-shaped red mark
- Mantle edge banded with red corresponding to marks on shell
- Tectura testudinalis has a brown head scar inside the shell
Lives attached to the underside of stable stones which have growths of red weed. Feeds on red algae especially Lithothamnion. Breeds in spring.
Occurs throughout Europe on Atlantic and Med coasts.