Prologue. - Visual Pigments of Invertebrates. - Natural Polarized Light and Vision. - Photoreception in Protozoa an Overview. - Evolution of Eyes and Photoreceptor Organelles in the Lower Phyla. - Photomovement Behavior in Simple Invertebrates. - Photoreceptors and Photosensitivity in Platyhelminthes. - Photoreceptors and Photoreceptions in Rotifers. - Photoréception et Vision chez les Annélides (Photoreception and Vision in Annelids). - Photoreceptor Structures and Vision in Arachnids and Myriapods. - Crustacea. - The Retinal Mosaic of the Fly Compound Eye. - The Roles of Parallel Channels in Early Visual Processing by the Arthropod Compound Eye. - Functional Neuroanatomy of the Blowfly's Visual System. - The Lobula-Complex of the Fly: Structure Function and Significance in Visual Behaviour. - Behavioural Analysis of Spatial Vision in Insects. - Neuroanatomical Mapping of Visually Induced Nervous Activity in Insects by 3H-Deoxyglucose. - The Rules of Synaptic Assembly in the Developing Insect Lamina. - Morphologie et Développment des Yeux Simples et Composés des Insectes (The Morphology and Development of Simple and Compound Eyes of Insects). - Molluscs. - Photoreception in Chaetognatha. - Photoreception in Echinoderms. - Epilogue. - Author Index. - Species Index. Language: English