Aethes margaritana (Haworth, 1811)
Silver Coast Conch
49.1180 (B&F: 948)
Aethes dipoltella (Hübner, )
It is thought to be extinct having not been seen since 1956. It habitat appears to be chalk downs and vegetated shingle beaches. The historical records are all near the coast. (Pratt, 2011).