Preface Introduction Part I. Meristic Variation: 1. Arrangement of evidence 2. Segments of arthropoda 3. Vertebrae and ribs 4. Spinal nerves 5. Variation in arthropoda 6. Chaetopoda, hirundinea and cestoda 7. Branchial openings of chordata and structures in connexion with them 8. Mammae 9. Teeth 10. Teeth (recapitulation) 11. Miscellaneous examples 12. Colour-markings 13. Minor symmetries: digits 14. Digits (recapitulation) 15. Minor symmetries: segments in appendages 16. Radial series 17. Radial series: echinodermata 18. Bilateral series 19. Further illustrations of the relationship between right and left sides 20. Supernumary appendages in secondary symmetry 21. Appendages in secondary symmetry 22. Duplicity of appendages in arthropoda 23. Secondary symmetry in vertebrates 24. Double monsters 25. Concluding reflexions Index of subjects Index of persons.
Preface Introduction Part I. Meristic Variation: 1. Arrangement of evidence 2. Segments of arthropoda 3. Vertebrae and ribs 4. Spinal nerves 5. Variation in arthropoda 6. Chaetopoda, hirundinea and cestoda 7. Branchial openings of chordata and structures in connexion with them 8. Mammae 9. Teeth 10. Teeth (recapitulation) 11. Miscellaneous examples 12. Colour-markings 13. Minor symmetries: digits 14. Digits (recapitulation) 15. Minor symmetries: segments in appendages 16. Radial series 17. Radial series: echinodermata 18. Bilateral series 19. Further illustrations of the relationship between right and left sides 20. Supernumary appendages in secondary symmetry 21. Appendages in secondary symmetry 22. Duplicity of appendages in arthropoda 23. Secondary symmetry in vertebrates 24. Double monsters 25. Concluding reflexions Index of subjects Index of persons.
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