Caecum clarkii Carpenter, 1858, in the Channel Islands, Great Britain: an extension of the known distribution to the North

After a thorough examination Van Aartsen & Fehr-de Wal (1975) concluded that Caecum clarkii Carpenter, 1858 (Gastropoda Prosobranchia: Caecidae) is known from several Mediterranean localities, the Azores, the Canary Islands, Portugal (Lagos) and the Atlantic coast of northern Spain (Laredo and Ria de Arosa). In July 1979 I collected an empty shell of Caecum clarkii with periostracum on the northeastern part of the famous Shell Beach on the island of Herm, Channel Islands. The specimen is preserved in my private collection. Dr. J. J. van Aartsen has kindly verified the identification.