With 25 original contributions by 30 international malacologists on systematics, nomenclature, distribution and preservation of world wide Mollusca. The book contains articles about: New Solenidae from Thailand, new Chondrinids from the Pyrenees and Alps, revision of fossil Rillyini, revision of East African Clausiliidae, faunistic results from Croatia and Lykia, check-list and red data list of the freshwater mussels of the Ukraine, new Canariella from the Canary Islands, invasion of molluscs in aquatic ecosystems, freshwater Mollusca of the Elbe estuaries, occurrence of Paralaoma servilis, introduced molluscs in Austria, new Pupinidae from Sumatra, new land operculates of Cameroon, revision of Rupestrella, Hydrobiidae from Bavaria, Sphaeriidae of a Polish lake, bone-eating molluscs, the contributions of Lea to the Unionidae, complete checklist and bibliography of the non-marine Mollusca of the Macaronesian Archipelagoes.