2016 463 p., 555 figures (many on coloured plates), 4to, hardbound. The present volume includes six major taxonomic paper, together documenting 213 species 137 of which are new to science, highlighting the extraordinary biodiversity of the South and West Pacific, in particular the Philippines, Papua New Guinea and New Caledonia. Includes the following papers: Bouchet et al., How many species of molluscs are there in the world's oceans, and who is going to describe them? / Sirenko, New, rare bathyal leptochitons (Polyplacophora) from the South and West Pacific / Glover & Taylor, Lucinidae of the Philippines: highest known diversity and ubiquity of chemosymbiotic bivalves from intertidal to bathyal depths (Bivalvia) / Marshall et al., Deep-sea wood-eating limpets of the genus Pectinodonta Dall, 1882 (Gastropoda) from the tropical West Pacific / Vilvens & Williams, New genus and new species of Solariellidae (Gastropoda) from New Caledonia, Fiji, Vanuatu, Solomon Islands, Philippines, Papua New Guinea and French Polynesia / Monsecour & Monsecour, Deep-water Columbellidae (Gastropoda) from New Caledonia / Fraussen & Stahlschmidt, The extensive Indo-Pacific deep-water radiation of Manaria (Gastropoda) and related genera.