Solid shell up to about 10cm in length. The outside is dirty white in colour; the inside is white. The shell gapes at both ends. The surface is sculptured with fine concentric rings. The pallial sinus is relatively deep.
- Lower margin of pallial sinus is confluent with the pallial line
Burrows in muddy sand or gravel where it filters phytoplankton.
Distributed from the English Channel south to the Mediterranean