Boring marine mollusc

Boring marine mollusc

Observation - Boring marine mollusc - UK and Ireland. Description: These limestone cobbles with borings in are abundant on the beach. The burrow is 11 mm diameter. It had the mollusc shells inside, but unfortunately I broke the shells when I broke the cobble open to get them out.

These limestone cobbles with borings in are abundant on the beach. The burrow is 11 mm diameter. It had the mollusc shells inside, but unfortunately I broke the shells when I broke the cobble open to get them out.