L. Margulis – författare

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.

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.

This volume is the fourth in the series of the Proceedings of the College Park Colloquia on Chemical Evolution. These Colloquia, and the resulting Proceedings, are presented in the interest of fostering the impact of the interdisciplinary nature of chemical evolu­ tion on contemporary scientific thought. vii EDITORS''INTRODUCTION The Fourth College Park Colloquium on Chemical Evolution was held on October 18 - 20, 1978 at the University of Maryland. The meeting, supported by the National Aero­ nautics and Space Administration and the National Science Foundation, centered on the variable environments, both past and present, in which living organisms have survived, grown, and evolved - the limits of life. Previous colloquia had emphasized the Giant Planets (1974) 1, Early Life during the Precambrian (1975)2 and Comparative Planetology (1976)3. The College Park Colloquia have been noted for the broad interdisciplinary nature of the training and interests of the participants. The fourth meeting was no ex­ ception with the participation of approximately 85 researchers, representing many academic fields. As with previous meetings, the interdisciplinary approach to the question of the limits of life encouraged the exchange of knowledge and information. A major scientific aspiration is to understand why living systems are restricted to certain environments.