At the First International Symposium on Aquatic Oligochaete Biology in Sidney, B. C. , the suggestion was made to hold the second in Pallanza, on Lake Maggiore, at the C. N. R. -Istituto Italiano di Idrobiologia. At the same time it was decided that there should be a symposium every third year. The organization of the symposium was made considerably easier by the Senior Editor's having been in personal contact with several Russian colleagues (courtesy of a kind invitation from the U. S. S. R. Academy of Sciences), the 'Hamburg Group' and the Junior Editor. Correspondence with various students of Oligochaeta also furnished many useful suggestions. The Second International Symposium on Aquatic Oligochaete Biology was therefore held in Pallanza in late September 1982 and was attended by 53 scientists from 16 countries in Europe, North America, Asia and Australia. No review papers were formally invited as this had already been done at the first symposium: all the papers were accordingly allotted the same time for oral presentation. These proceedings contain all papers Hrabe and Slepukhina, which were given in absentia, as it presented at the symposium, including those by was impossible for the authors to join the group. The main topics were taxonomy and evolution of Oligo chaeta, life-cyle and population studies, the role of Oligo chaeta in assessing water pollution, physiolog ical studies, community and distribution studies. Special taxonomic workshops took place in the evenings.

Proceedings of the Second International Symposium on Aquatic Oligochaete Biology, held in Pallanza, Italy, September 21-24, 1982

Inhalt
Howard R. Baker (19551983) in memoriam.- One: Taxonomy and Evolution.- 1. A phenetic and cladistic study of spermatozoal ultrastructure in the Oligochaeta (Annelida).- 2. Two atavistic characters of some Lumbriculidae and their importance for the classification of Oligochaeta.- 3. Phylogenetic and taxonomic problems in freshwater Oligochaeta with special emphasis on chitinous structures in Tubificinae.- 4. The position of the Haplotaxidae in the evolution of oligochaete annelids.- 5. Aspects of the phylogeny of the marine Tubificidae.- 6. Specific criteria in Grania (Oligochaeta, Enchytraeidae).- 7. Capilloventer atlanticus gen. et sp.n., a member of a new family of marine Oligochaeta from Brazil.- 8. A method of identifying immature specimens of marine Enchytraeidae (Oligochaeta) by vital staining of epidermal glands.- Two: Cytology and Physiology.- 9. Cytological aspects of oligochaete spermiogenesis.- 10. Life-cycle and karyology of Branchiura sowerbyi Beddard (Oligochaeta, Tubificidae).- 11. Diet and histophysiology of the alimentary canal of Lumbricillus lineatus (Oligochaeta, Enchytraeidae).- 12. The gutless oligochaete Phallodrilus leukodermatus Giere, a tubificid of structural, ecological and physiological relevance.- Three: Life Cycle, Production and Population Dynamics.- 13. Asexual propagation and reproductive strategies in aquatic Oligochaeta.- 14. Life cycles and reproductive adaptations of marine Oligochaeta from European boreal shores.- 15. Parthenogenesis in Tubificidae.- 16. Potential age of aquatic Oligochaeta.- 17. Growth of Stylaria lacustris (L.) (Oligochaeta, Naididae).- 18. The biology of Psammoryctides barbatus (Grube) in English chalk streams.- 19. Cohort cultures of Psammoryctides barbatus (Grube) and Spirosperma ferox Eisen: a tool for a better understanding of demographic strategies in Tubificidae.- 20. Oxygen demand and long term changes of profundal zoobenthos.- Four: Pollution and Community Structure.- 21. Oligochaete communities as biological descriptors of pollution in the fine sediments of rivers.- 22. Eutrophication of Lakes Léman and Neuchâtel (Switzerland) indicated by oligochaete communities.- 23. Lethal and sublethal tolerances of aquatic oligochaetes with reference to their use as a biotic index of pollution.- 24. Oligochaeta of the middle Po River (Italy): principal component analysis of the benthic data.- 25. Short term dynamics of the dominant annelids in a polyhaline temperate estuary.- 26. The occurrence of species of semi-aquatic Enchytraeidae (Oligochaeta) in Ireland.- 27. The oligochaetes (Annelida, Oligochaeta) in a lake and a canal in the agricultural landscape of Poland.- 28. Oligochaeta of the epigean and underground fauna of the alluvial plain of the French upper Rhône (biotypological trial).- 29. Comparison of different methods ot water quality evaluation by means of oligochaetes.- Five: Distribution.- 30. On aquatic Oligochaeta Lumbricomorpha in Europe.- 31. Diversity and zoogeography of marine Tubificidae (Annelida, Oligochaeta) with notes on variation in widespread species.- 32. Distribution and habitat characteristics of Naididae and Tubificidae in the inland waters of Israel and the Sinai Peninsula.- 33. A taxonomic and faunistic survey of the marine Tubificidae and Enchytraeidae (Oligochaeta) of Italy. Introduction and preliminary results.- 34. Ecology and importance of Oligochaeta in the biocoenosis of zoobenthos in lakes of the National Park of the Lithuanian SSR.- 35. The distribution of aquatic oligochaetes in the fenland area of N.W. Overijssel (The Netherlands).- 36. Oligochaeta from profundal zones of Spanish reservoirs.