With the aim of studying the local malacofauna, the authors visited Skokholm_Island (Pembrokeshire, Wales, UK) in 1990 and 1991. In this paper, known data are supplemented by the results of the authors ' fieldwork. A total of 114 species were recorded; 49 are new records for Skokholm Island, of which four are also new for the Bristol Channel region. On the basis of the current results a marine reserve status for Skokholm is recommended.