196 



INDEX 



Danais archippus, 138, PI. 76; chrysippus, 



PL 76. 

 Darwin, Charles, 47, 48, 52, 189, PI. 32, 



PL 95- 

 "Darwin and after Darwin" (Romanes), 



105, 189, 191, PI. 17, PI. 36, PI. 37, PI. 

 4-1, PL 75, PI. 93-97- PL 99- 



" I larwiniana" (Huxley), 190. 



"Darwinism" (Wallace), 35, 132, 144, 189, 

 191. 



DasvcJiira pudibunda, PI. JJ. 



Datanij iiiuiistra, PL '/j. 



Dean, Forest of, segregation of deer in, 65. 



Death, at close of reproductive period, 20, 

 22, 23, 24; bagworm moth, 21 ; capital 

 punishment, 25 ; causes, 14 ; drone bees 

 and young queen bees, 22, 23 ; of indi- 

 vidual for general welfare, 20-25; rate > 



12. 



Decapoda, development of, 98, PI. 39-41. 



Decoy, male birds serve as, 50. 



Deer, antlers, 106, 707, PL 43 ; protective 

 color, 120; secondary sexual characters, 

 53 ; segregation, 65 ; signals, 146. 



Degeneration, 183-187. 



Delage, Yves, PI. 101. 



"Descent, Lectures on the Theory of" 

 (Weismann), 189. 



"Descent of Man " (Darwin), 52, 189. 



Deterioration due to escape from struggle 

 for existence, 170; due to parasitism, 

 184 et set/. 



Devonian fossils, 106. 



De Vries, Hugo mutation, 18, 19, 39. 



Dianthcecia compta, PI. jj. 



Diapheromera femorata, PL bi. 



Diatoms, skeletons of, 32, /'/. 2r. 



Dimorphism, in flowers of Alitc/iella, 156, 

 PI. 88 ; sexual, see Sexual selection. 



Discontinuous variation, 19. 



Disease, 169, 171. 



Dismal Swamp fish, 95. 



Dismorphia a sty no we, PI. 77. 



Dissosteira Carolina, PL Sj. 



Distribution, geographical, 87, 111-116. 



Divergence, degree of, in variation, 9 ; from 

 species type, an advantage in struggle 

 for existence, 26 ; in relation to Men- 

 delian phenomena, 46; sexual, see Sexual 

 selection ; swamped by cross-breeding, 

 41. 



Dog, mating, 48 ; skeleton of fore limb, 92. 



Dolichonyx oryzivorus, PI. 22. 



Doliops sp. and D. cur culion ides, Pi. 73. 



Doryphora decemlineata, PL 69. 



Dragon-fly, /'/. jv, /'/. jj. 

 Drone-fly, imitates bee, 136, /'/. 74. 

 Drouth as cause of segregation, 43. 

 Dugmore, A. R., PI. 48, PI. 50, PI. 58. 

 Dugong, nictitating membrane, PL 36. 

 Dynastes her cults, 51, PL 30. 



Eagle nictitating membrane, PI. 36. 



Ear, change of function, 39 ; man and apes, 



165, PI. 94-96 ; vestigial muscles of 

 human, 94, gj. 



Education (plasticity), 27 ; susceptibility 

 to, hinders Evolution, 177. 



Egypt, 175. 



Elaps, 142, PL 79. 



Elephant hawk moth, 139, 140, PL 78. 



Elk correlation between antlers and liga- 



mentuni niic/ue, 35. 

 Elymnias phegea , PL 77. 

 Embryology, comparative, 87, 96-103 ; of 



higher Crustacea, 89, PL 39-41 ; of man, 



1 66, PL 98; of vertebrates, 97, PI. 38, 

 PL 98. 



Einvdia Jacob eat, PL 70. 



Environment, and nature of organism, iSS; 

 change in makes evolution rapid, 26 ; 

 inheritance of direct effects of, 72 ; 

 nature of man's, 172. 



Epeira prompta and stellata, PL 64. 



Epilol'imn hirsittiiw, 139. 



Epipactys latifolia, PL 89. 



Equiis, PL 47. 



Eriopus purpureofasciata, PL 55. 



Eristalis tenax, PL 74. 



Ervthrolamprus esculapii and venustissi- 

 uts, PL 79. 



" Essays upon Heredity and Kindred Bio- 

 logical Problems" (Weismann), 189, 191. 



Euc/iistus ser-sus, PL bq. 



Euphca midannts. 138, 150, PL 84. 



Evermann, Barton G., PI. 48, PI. 58. 



" Evolution and Adaptation " (Morgan), 190. 



"Evolution and Ethics" (Huxley), 190. 



" Evolution and its Relation to Religious 

 Thought" (Le Conte), 190. 



Extirpation of organs, effects of, 34. 



Eye, deterioration of human, 170 ; of cave- 

 dwelling animals, qj ; of various verte- 

 brates, PL 97. 



Factors in evolution, Intro, xi, 82, iSS. 



Family, 24, 182. 



Faroe Islands, segregation of sheep, 65. 



