Materials for the Study of Variation : Treated with Especial Regard to Discontinuity in the Origin of Species (Paperback)

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.