ciplines, particularly ecologists. Ecologists are currently obtaining basic information on primary productivity and tors, both as to the kinds and quantities of toxins pro- will be the basis for producing more food and fiber to meet the requirements of the rapidly increasing world population and to prevent further damage to natural ecosystems as well as the rehabilitation of ecosystems that have deteriorated. not only from coincidence of soil and climatic requirements but also from tolerance of one another’s exudates mineral cycling of natural ecosystems. This information Internationally known scientists will present general prin- ciples and specific information on primary productivity and mineral cycling in natural ecosystems. If these sctentists, by their accomplishments, can encourage others to add to the limited pool of knowledge in this area, then a significant step forward will have been madein the solution of these major world problems: overpopulation and environment deterioration. Harold E. Young, Afanasii 1. Marchenko, Peter J. Rennie, Taisitiroo Satoo, Howard T. Odum, Bostwick H. Ketchum, Jerry S. Olson, Rudolph F. Scheltema, J. D. Ovington, F. H. Bormann, G. M. Woodwell, D. W. Cole, S. P. Gessel, S. F. Dice, R. H. Whittaker, and H. A. 1, Madgewick. A Coastal Marine Ecosytem: Diversified Ecological Approaches to Barnstable Harbor, Massachusetts (29 Dec.) Arranged by David C. Grant and Roger H. Green duced by planis and their persistence and effectiveness in the environment. Thus associations of plants may derive which in turn are somewhat controlled by soil and climatic qualities. John Cantlon, Cornelius Muller, H. B. Tukey, F. W. Woods, and Helmut Leith. Adaptive Radiation in Aquatic Animals (28 Dec.) Arranged by Arthur H. Clarke, Jr. (National Museum of Canada) and Alan H. Cheetham (U.S. National Museum). Many aquatic animal groups have increased in diversity during Paleocene to Recent time by exploiting ecologic or biogeographic opportunities through acquisition of advantageous morphologic, physiologic, or behavioral features. Adaptive radiation, grounded in Cenozoic or earlier evolutionary events, is less well known in aquatic animals than in some terrestrial groups. Participants in the symposium will discuss neontologic and paleontologic views of adaptive radtation and will present evidence for rates of radiation and the functional bases of adaptation, Those groups of Recent invertebrates and vertebrates having a fossil record and occurring in a wide variety of freshwater and marine habitats will be emphasized. existing ecological research on a single ecosystem, to synthesize the information within the context of modern ecological theory, and to point out any gaps in the present Arthur H. Clarke, Jr.. Eugene G. Munrow, Alfred S. Romer, Richard Cifelli, Alan H. Cheetham, John W. Wells, David Nicol, J. Wyatt Durham, G. Arthur Cooper, Richard Hf. Benson, E. L. Bousfield, Richard Lund, Alan Keast, Max K. Hecht, and Frank Whitmore, Jr. sive studies carried out in the past several years by many Techniques for Comparative Studies of Protein Structure (Marine Biological Laboratory). This symposium has been arranged to draw together the knowledge of a relatively well-known system. Barnstable Harbor is particularly appropriate because of the exten- persons utilizing diverse approaches. The symposium will consist of two half-day sessions of half-hour papers synthesizing the participant’s individual research in Barnstable Harbor with any later or current marine ecological work. In addition to comments on the individual presentations, there will be a general round-table discussion and summary at the conclusion of the symposium. David C. Grant, Alfred C,. Redfield, J. Dungan Smith, Donald C. Rhoads, John D. Palmer, Charlotte P. Mangum, Charles E. Jenner, Rudolph F. Scheltema, Roger H. Green, Katherine D. Hobson, Eric L. Miils, and Howard L. Sanders, Allelopathy Amongthe Higher Plants (30 Dec.) Arranged by Pierre Dansereau (New York Botanical Garden, Bronx) and John Cantlon (Michigan State Uni- versity). The mechanism of evolution in vegetation differs from that in species in detail only. The selective pressures in each include antagonisms between organisms which may determine survival of specific genomes as well as inter- Specific associations. Allelopathy is a factor frequently responsible for such antagonisms and capable of controlling germination, ecesis, invasion, dominance, exclu- sion, and ultimate vegetational composition. The toxic products involved in allelopathy are controlled by habitat fac8 DECEMBER 1967 (29 Dec.) Arranged by Charles G. Sibley (Yale University). This symposium will concern the application of the techniques of protein chemistry, specifically structural techniques, to the study of systematic problems. Techniques which permit one to determine the sequence of amino acids in a polypeptide chain or which provide an index to part or all of the sequence will be discussed. Charles G. Sibley, Richard A. Laursen, Russell F. Doolittle, and E. Margoliash. Zoologists’ Library and Book Lounge The Zoologists’ Library and Book Lounge will be open throughout the meetings as a lounge and informal meeting place. Ali zoologists are invited to visit this room and to examine the special exhibits arranged there. The Lounge again will feature the extensive collection of recent books and monographs on zoological subjects. Books in the collection include works on all aspects of animal science: general zoology and biology texts, reference books, natural histories, works on principles and philosophical aspects of zoology, popular books and guides, periodicals, and monographs on specific groups of animals. The collection includes most of the books on animals currently in print in the English language. 1353