Incluye referencias bibliográficas e índice CONTENIDO: Introduction: Fossils and phylogeny -- Evolution: Patterns and process -- The basic vertebrate body plan -- The earliest fossil vertebrates: The ostracoderms -- The first jawed fishes -- Early bony and cartilaginous fishes -- Later cartilaginous fishes -- Later bony fishes -- Designs for land life -- The amphibians -- Early reptiles -- The great reptile land radiations -- Lasser land and amphibious radiations -- Reptile designs for marine life -- Reptile designs for flight -- The origin of mammals -- Diversity of mammalian design -- The evolutionary radiations of the mammals.