Rissoaform gastropods from the Antarctic and sub-Antarctic. The Eatoniellidae, Rissoidae, Barleeidae, Cingulopsidae, Orbitestellidae and Rissoellidae (Mollusca: Gastropoda) of Signy Island, South Orkney Islands, with a review of the Antarctic and sub-Antarctic excluding South America and the New Zealand sub-Antarctic islands) species. British Antarctic Survey Scientific Reports, No. 108 1983: 1-96. 32 [Zoological Record Volume 120]