1. Shell has many distinct spiral ridges and several subsutural costae. Covered by yellowish, rust-brown or black periostracum that may be partly or completely worn off to reveal white shell beneath.
2. Solid, conical spire with convex whorls and distinct sutures. Not fusiform.
3. No protrusions within aperture.
4. Flesh translucent white with some opaque white and internal pinkish buccal mass.
5. In crevices, often with L. bidentata. Also among weeds, corallines and mussels.
Height 3 mm. Menai Strait, Wales. June 2013.

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