INDEX. 



Accidental variations, i, 83. 

 Acquired variations, 33. 

 Acracids, ig. 

 AcTsa, 53. 

 Active selection, 38. 

 Adaptations, i, 10, 23, 61, 8a. 

 ^ Adaptiveness, 66 footnote, 67, 74 et 

 seq. 

 Ageronia, ig. 

 Ansa, 33. 

 AiUagtn, 35, 47, S3. 

 Arthnpoda, 33, 63. 

 Anicnlata, 30. 

 Artificial selection, 33. 

 Askenas;, 34, 60, 83. 

 Atoms, 57, sS. 



BSr, K. E. von, 73. 



Bateson, 18, 73, 80. 



" Better " individuals, 76, 



Biology, character ot Fesearch in, 7. 



Biophores, 40, 47, jS. 



Boltzmann, 4, s- 



Bonnet, S3- 



Bonme, footnote, 54. 



Brucke, 40. 



Butterflies, 14 et seq., 18 et seq., 81. 



Catonephele, 50. 



Chance, 61. 



Chemical selection, 71. 



Chitons, 38. 



Coadaptation, 3a 



Colorings, protective, 14 et seq. 



Constancy of species, 46. 



Constructs, 8. 



Coimi, 66 footnote. 



Correlation, 3z. 



Danaids, 19. 



Darwin, 11, 35, sg, 36, 38, 66, 81, S3. 

 Definite variation, 3, 4, 60, 76-79, 82. 

 Degeneration, 30 et seq., 39 et seq. 



55. 63, 64, 79. 

 Delfige, Yves, 40, 69. 

 Determinants, 6 et seq., 10, 36 et seq 



4». 54. 58. 

 Developmental mechanics, 8, g. 

 De Vries, 40. 

 Dimorphism, s8. 

 Directions of variations, 83. 

 Directive forces, 33, 24. 

 Dixey, 51 footnote. 

 Dohm, 81. 

 Driesch, Hans, 13. 

 Dyer, Thiselton, 78-79. 



Kimer, 16, 70. 



Emery, 71, 83-S4. 



Empedocles, 75. 



Epigenesis, 53 footnote, 58, 59. 



Euploids, ig. 



Europeans, exempt from malarial 



fevers, 83. 

 Eurypheme, 22. 

 Evolution, 53 footnote, 59. 



Fireworks, determinants and ids 



compared to, 7. 

 ••Fits," 6 footnote. 

 Pluctnations of development, 74-75- 

 Formative laws, 17 et seq., 33. 

 Frog, 14. 



Functional adaptation, 39. 

 Functionless parts, 64. 



Galton, 36. 



Germs, 7 et seq., 40 et seq. 



