Description

Section I Selected Aquatic Plant Organisms.- Dasycladaceae: A Family of Giant unicellular Algae Ideal for Research.- Acetabularia: A Giant Unicellular Organism for Studying Polarity.- Model Algal System to Study Plant Development.- Section II Selected Aquatic Animal Organisms.- Experimental Analysis of Developmental Processes in Marine Hydroids.- Reproduction and Development in Ctenophores.- Descriptive and Experimental Embryology of the Turbellaria: Present Knowledge, Open Questions and Future Trends.- Growth, Degrowth and Regeneration as Developmental Phenomena in Adult Freshwater Planarians.- Genealogy, Geometry and Genes: Experimental Embryology of Caenorhabditis elegans.- Gap Junctional Communication and Cell Cycle Duration in the Early Molluscan Embryo.- In vitro Preparation of the Early Squid Blastoderm.- On the Establishment of Polarity in Polychaete Eggs.- Experimental Embryology in Leeches: Cellular and Molecular Approaches.- Practical Approaches to the Study of Nervous System Development in Hirudinid Leeches.- Starfish Oocytes and Sea Urchin Eggs as Models to Study the Intracellular Mechanisms Controlling the Cell Division Cycle.- Morphogenesis in the Sea Urchin Embryo: Mechanism of Gastrulation.- Fertilization in Aquatic Animals.- Patterns of Gene Expression during Ascidian Development.- Some Contributions of Research on Early Teleost Embryogenesis to General Problems of Development.- Gastrulation in the Zebrafish Brachydanio rerio (Teleostei) as seen in the Scanning Electron Microscope.- Section III Historical and Conceptual Aspects of "Causal Embryology".- L'Epigenèse et la Préformation à l'Epoque de l'Embryologie Causale.- Section IV Contributions of General Value to Embryological Research.- The Role of Retinoic Acid in Vertebrate Limb Morphogenesis.- Physiological Approach to the Early Embryogenesis.- Environmental Pollution and Embryonic Development: Relevance of Standardized Toxicological Tests.- Participants Photo.- Author Index.