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Cleve Hickman is Professor Emeritus at Washington and Lee University, Lexington, VA. He received his Ph.D. in Zoology from the University of British Columbia, did research in animal physiology for eight years, and taught zoology for over 30 years. He's made over 20 trips to the Galapagos Islands for research and as an instructor for student field trips Larry Roberts is currently teaching parasitology and marine biology at the University of Miami. He received his Ph.D. in Parasitology from Johns Hopkins University and is a coauthor of Foundations of Parasitology, 5/e. Past teaching affiliations include University of Massachusetts, Texas Tech University, and Florida International University. Dr. Roberts has authored numerous research articles and a title of related interest: Underwater World of Sport Diving. Susan Keen is Lecturer at the Section of Evolution and Ecology of University of California. Allan Larson is an Associate Professor at Washington University, St. Louis, MO. He received his Ph.D. in Genetics at the University of California, Berkeley. His fields of specialization include Evolutionary Biology, Molecular Population Genetics and Systematics, and Amphibian Systematics. He's taught courses in general biology, evolution, and population biology. David J. Eisenhour an Associate Professor of Biology at Morehead State University.

1. Science of Zoology and Evolution of Animal Diversity2. Animal Ecology
3. Animal Architecture
4. Taxonomy and Phylogeny of Animals
5. Unicellular Eukaryotes
6. Sponges: Phylum Porifera
7. Cnidarians and Ctenophores
8. Acoelomorpha, Platyzoa, and Mesozoa: Flatworms, Gastrotrichs, Gnathiferans, and Mesozoans
9. Polyzoa and Kryptrochozoa: Cycliophora, Entoprocta, Ectoprocta, Brachiopoda, Phoronida, and Nemertea
10. Molluscs
11. Annelids and Allied Taxa
12. Smaller Ecdysozoans
13. Arthropods
4. Chaetognaths, Echinoderms, and Hemichordates
15. Vertebrate Beginnings: The Chordates
16. Fishes
17. The Early Tetrapods and Modern Amphibians
18. Amniote Origins and Nonavian Reptiles
19. Birds
20. Mammals