A completely revised edition of this classic textbook. It surveys all invertebrate phyla, with emphasis on evolutionary adaptations and phylogeny.
Introduction; Classification; Protozoa; Metazoans; Mesozoa and placozoa; Porifera; Cnidaria; Ctenophora; Gnathostomulida; Platyhelminthes; Gastrotricha; Rotifera; Acanthocephala; Lorcifera; Kinorhyncha; Priapulida; Nematomorpha; Nematoda; Chaetognatha; Coelomates; Mollusca; Nemertinea; Sipuncula; Echiura; Pogonophora; Annelida; Near arthropods; Arthropoda; Uniramia; Cheliceriformes; Crustacea; Phoronida; Bryozoans; Brachiopoda; Echinodermata; Hemichordata; Chordates; Phylogeny.