Section I. Amphibians. - 1. The Origin of the Amphibians. - 2. Living Amphibians. - 3. Metamorphosis in Urodeles. - 4. Metamorphosis in Anurans. - 5. General Consideration of the Endocrinal Mechanisms Responsible for Anuran Larval Metamorphosis 10. - Section II. Staging of Embryonic and Larval Amphibians. - 6. Anurans and Urodeles. - 7. Caecilia (Apoda or Gymnophiona). - 8. Tables of Staged Specimens. - Section III. Organic Origin Development and Change In Anuran Larvae to the Completion of Metamorphosis. - 9. Introduction. - 10. The Thyroid Gland. - 11. The Pituitary Gland. - 12. The Hypothalamus and Median Eminence. - 13. The Ultimobranchial Body. - 14. The Parathyroid Glands. - 15. The Larval SkeletonSpecific Features During Metamorphosis. - 16. The Notochord. - 17. The Central Nervous System. - 18. Larval Musculature. - 19. The Blood. - 20. The External and Internal Gill Filaments. - 21. Balancers. - 22. Features of the Larval Respiratory System. - 23. The Alimentary Canal. - 24. The Pancreas. - 25. The Liver. - 26. The Pronephros. - 27. The Lymph Glands. - 28. The Skin of Amphibian Larvae. - Section IV. Cellular Differentiation Ontogeny and Molecular Biology. - 29. A Consideration of Cellular Diversity. - 30. Early Cleavage Cells and Their Nucleocytoplasmic Relationship. - 31. Cellular Differentiation During Embryogenesis to Premetamorphosis. - 32. Appraisal of Morphological and Functional Cellular Changes During Metamorphosis. - 33. Epilog. - References. - Species Index. Language: English