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About this book
Many biological facts are irreconcilable with the assumption that larvae and adults evolved from the same genetic stock. Williamson claims that the basic forms of all larvae and all embryos have been transferred from foreign taxa. This leads to a new, comprehensive theory on the origin of embryos and larvae, representing a change in taxon during development.
Contents
Foreword.- Preface to the First Edition.- Preface to the Second Edition.-Acknowledgements.- 1. Introduction.- I Overview. 2. Larvae. 3. The issues in context.- II Examples. 4. Blastulas, Gastrulas and the first animals. 5. Coelenterate Animals. 6. Trochophorate animals: polychaetes, echiurans, sipunculans, molluscs. 7. Near-Trochophorate animals: flatworms, nemerteans, bryozoans, lophophorates. 8. Echinoderms: adults and larvae. 9. Echinoderms and hermichordates. 10. Echinoderms: metamorphosis. 11. Echinoderms: sea-urchings and brittle-stars. 12. Echinoderms: fossil record. 13. Urochordates. 14. Arthropods.- III Solutions. 15. Hybrids.- IV Conclusions. 16. Towards a new zoology.- Bibliography.- Glossary.- Index.
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