目次

1 Environmental Considerations 2 Invertebrate Classification andRelationships 3 The Protozoan Protists 4 The Poriferans and Placozoans5 Introduction to the Hydrostatic Skeleton 6 The Cnidarians 7 TheCtenophores 8 The Platyhelminthes 9 The Gnathifera: Rotifers,Acanthocephalans, and two smaller groups 10 The Rotifers andAcanthocephalans 11 The Nemertines 12 The Molluscs 13 The Annelids 14The Arthropods 15 Two Phyla of Likely Arthropod Relatives: Tardigrada andOnychophora 16 The Nematodes 17 Four Phyla of Likely Nematode Relatives:Nematomorpha, Priapulida, Kinorhyncha, and Loricifera 18 Three Phyla ofUncertain Affiliation: Gastrotricha, Chaetognatha, and Cyliophora 19 TheLophophorates (Phoronids, Brachiopods, Bryozoans) and Entoprocts 20 TheEchinoderms 21 The Hemichordates 22 The Xenoturbellids 23 TheNonvertebrate Chordates 24 Invertebrate Reproduction and Development--AnOverview