RareDistributed from the north of Britain to Norway, including the Baltic.
Burrows in sandy mud or gravel.
- Sculpture of 25-30 concentric ridges on shell surface
- Margin of the shell is smooth
- Periostracum is mesh-like
Solid shell up to 3cm in length. It is white in colour obscured by dark brown periostracum. The surface of the shell is sculptured with concentric ridges and finer lines.