INDEX 



Abraxas grossulariata and lacticolor, 

 108. 



Adaptations, origin of, 7, 21 ; evolu- 

 tion of, 188. 



Agonus cataphractus, 28. 



Albinism, 187. 



Allantois, 231. 



Allurements, 70. 



Alytes obatetricans, 232. 



Amblyopsis, eyes of, 189. 



Amblystoma tigrinum, 224. 



Amnion, 231. 



Anableps tetr ophthalmia, 192. 



Anas boscas, 84 ; crosses of, 186. 



tristis, crosses, 186. 



Ancel and Bouin, 92. 



Anguis fragilis, 227. 



Antilocapra, 165. 



Antirrhinum, crossing of, 173. 



Antlers of stags, 71, 122. 



Ants, heredity of sex in, 55. 



Aphidae, heredity of sex in, 56. 



Apoda, 227. 



Axolotl, albino, 192 ; metamorphosis, 

 223 ; influence of thyroid feeding, 

 224. 



BARRED plumage in fowls, 115. 



Basch, 99. 



Bateson, 17, 44, 171. 



Bees, heredity of sex in, 55. 



Bernard, Claude, 91. 



Berthold, A. A., 91. 



Biedl, 145 ; and Konigstein, 98. 



Bionomics, 3. 



Blindness in cave animals, 189. 



Bombyx mori, 158. 



Boring, Miss, 95. 



Born and Frankel, 103, 145. 



Brachydactyly, 171. 



Bresslau, 135. 



Brown-Sequard, 91. 



Biihler, 143. 



Cambarus, males of, 73. 

 Capons, 74. 



Castle, experiments in grafting, 237 ; 

 on sex, 58. 



Castration, 73 ; in ducks, 81 ; of 



frog, 163 ; of Lepidoptera, 158. 

 Cats, heredity of colour in, 117. 

 Cave animals, absence of pigment, 



191. 



Cephalopoda, 2. 



Cetacea, absence of scrotum, 150. 

 Chelonia, 36. 

 Chologaster agassizii, 191. 

 Chromosomes, 41 ; in mutations, 



183. 



Clevelandia, 190. 

 Colaptes, 18. 

 Colour-blindness, 113 ; heredity of, 



108. 

 Colours, origin of, in domesticated 



breeds, 187. 

 Comb of fowls, uselessness of, 



Corpora lutea, evolution of, 139; in 

 viviparous lower vertebrates, 143 ; 

 origin of, 98, 100. 



Corystes cassivelaunus, 2. 



Courtship, organs of, 70. 



Criss-cross inheritance, 112. 



Crossing over, 176. 



Cryptorchidism, 94, 152. 



Cuttle-fishes, 2. 



Cyclostomes, absence of corpora 

 lutea in, 143. 



Cytology, 65. 



Cytoplasm, in heredity, 43. 



Dafila acuta, crosses, 186. 

 Daphnia, heredity of sex in, 56. 

 Darwin, 6, 14. 

 Dasyurus, 146 ; corpora lutea, 144 ; 



lactation, 98, 101, 138. 

 Davenport, 235. 

 Determinants, 43. 

 Determination of sex, 120. 

 Dipnoi, fins, 226. 

 Dog-fishes, oviparous and viviparous, 



4. 

 Dominant characters, origin of, 44, 



171. 

 I Doncaster, 110; on heredity in cats, 



117. 



248 



