INDEX 



(Italicized page numbers and plate numbers indicate illustrations of the subject mentioned.) 



Abraxas gloss ularia, PI. 70. 



Acquired characters, 67. 



Acr&a egina and gea, PI. 77. 



Acraida:, 132, 137, PL 76, PL 77. 



Acronycta alni and psi, PL ?l. 



Adalia bipunctata, PI. 69. 



Adaptation, innate, 27; not explained by 

 the theory of the inheritance of parental 

 modification, 78, of the individual, 27, 

 28, 177, 192. 



ALgialitis vocijera, PL 82. 



Agassiz's cave fish, 95. 



Aggressive coloration and resemblance, 

 125-127; mimicry, 145. 



Alaska, former mild climate of, 62, 112. 



Alchemy, Intro, ix. 



Alga, 32, 36, 91, PL 21. 



Algiers, alluring color in lizard, 129. 



Allen, Grant colors of flowers, 162, 198. 



Allen, J. A. variation in Florida birds, 9. 



Alluring colors and resemblances, 127-129. 



Altruism, 25, 176, 180, 182. 



Amauris echeria and niavius, PI. 76. 



Amazon Valley butterflies, 5 1 ; leaf- 

 cutting ants and tree-hoppers, 137, 



PI- 75- 



Amblystoma, tadpole, 98. 



"American Food and Game Fishes" 

 (Jordan and Evermann), PL 48, PL 58. 



Amoeba, inheritance of parental modifica- 

 tions, 68; reproduction, 68; simple or- 

 ganization, 91. 



Anatomy, comparative, 87, 88-96. 



Ancon sheep segregation, 65. 



"Animal Behaviour" (Lloyd Morgan), 198. 



"Animal Life" (Jordan and Kellogg), 

 62, 95, 198, 199. 



"Animal Life and Intelligence" (Lloyd 

 Morgan), 198. 



Antarctic continent, former existence of, 

 114. 



Antelope, confusing coloration, 148, PL 81 ; 

 protective color, 120; signalling, 146, 

 PL 81. 



201 



Antlers of deer, 106, 707, PL 43; of 



elk correlation with ligamentum nu- 



chtz, 35. 

 Ants antlike spiders, 737, 138, 145 ; 



mimicked by tree-hoppers, 137, PL 75 > 



unpalatable, 137. 

 Apatura iris, PL 56. 

 Ape related to Hominida, 163; ear 



of Barbary ape, PL 94; nictitating 



membrane, PL 36. 

 Apis mellijera, PL 74. 

 Aplecta occulta, PL 55. 

 Apocyrtus, PL 73. 

 Appendix, vermiform, man and orang, 166, 



PL 96. 



Apteryx, vestigial wings, 94, PL 35. 

 Arbutus, trailing, 7, 154. 

 Archaopteryx lithographica, 109, PL 44. 

 Arctia caja, PL 70, PL 71. 

 Arctic fox, 126, 127. 

 Argus pheasant, PL 24. 

 Ariamnes attenuata, PL 64. 

 Aristolochia sipho, 158, PL 90. 

 Artificial selection, 28-31. 

 Asexual reproduction and inheritance of 



parental modifications, 71. 

 Astia vittata, var. nigra, PL 28. 

 "Astrolabe, Voyage de 1'," 145. 

 Attacus atlas, 143. 



Attractiveness, criteria in choice in mar- 

 riage, 181, 182, 183. 

 Australasia fauna, 113; limits of fauna 



(map), 115. 



Avebury, Lord, color sense in insects, 

 159 et seq., 198. 



Bacteria, rate of increase, 14. 



Bagworm, 21. 



Baldwin, J. Mark, 27, 192. 



Bali Lombok strait (map), 115. 



Barnacle goose, 3, 5; goose barnacle, 3, 



4, 5; sacculina, 184, 185, PL 101. 

 Barriers to migration, 112. 

 Basilarcha (Limenitis) disippus, 138, PL 76. 



