INTERNATIONAL SOCIETY FOR EVOLUTIONARY PROTISTOLOGY (ISEP) 5th International Meeting 1983 Banyuls-sur-Mer, France, June 4-6, 1 For the first time since its inception, at Boston University in June 1975 , the Society for Evolutionary Protistology met in Europe. Under the direction of Marie-Odile Soyer- Gobillard and hosting some 70 people representing a dozen nations (Belgium, Canada, Denmark, England, France, W. Germany, The Netherlands, Poland, Scotland, Spain, Switzerland, U. S. A. ) the meeting was held at Banyuls-sur-Mer in Catalunya. The 1983 ISEP met at the famed Laboratoire Arago on the Mediterranean Sea, most partici- pants were housed in the Laboratory’s newly refurbished Grand Hotel. The previous meetings had emphasized single themes, e. g. , (First) Boston, 1975 Evolution of Mitosis in Eukaryotic Microorganisms: (Second) Downsview Ontario, 1977 Criteria for Phylogeny in Protists. In spite of the fact that the third meeting, planned for Leeds, England in June of 1979, was never held some of the papers scheduled to be presented there were published in BioSystems, Volume 12, Numbers 1 and 2. The fourth meeting at Port Deposit, Maryland, 1981 called Conference on Cellular Evolution focused on the Evolution of Micro tubules, Mitosis, Microfilaments and other Fibrillar Systems. The proceedings of this meeting were published in BioSystems, Volume 14, Numbers 3 and 4.