Lopha (Actinostreon) marshii (Sowerby)
Mass of corrugated oysters lying one on top of the other. The strong corrugations on the valves are a modification to living in strongly agitated waters. Lovely example.
Jurassic, Oxfordian, Corallian.
Ringstead Bay, Weymouth, Dorset.
Specimen : 13 x 7 x 7 cm.
