INDEX 



Abraxas grossulariata and lacticolor, 

 108. 



Adaptations, origin of, 7, 21 ; evolu- 

 tion of, 188. 



Agonus cafaphractus, 28. 



Albinism, 187. 



Allantois, 231. 



Allurements, 70. 



Alytes ohstetricans, 232. 



Amhlyopais, eyes of, 189. 



Amhlystoma tigrinum, 224. 



Amnion, 231. 



Anahleps tetrophthalmus, 192. 



Anas hoscas, 84 ; crosses of, 186. 



tristia, crosses, 186. 



Ancel and Bouin, 92. 



Anguis fragilis, 227. 



AntUocapra, 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. 



Bomhyx mori, 158. 



Boring, Miss, 95. 



Born and Friinkel, 103, 145. 



Brachydactyly, 171. 



Bresslau, 135. 



Brown-S^quard, 91. 



Biihler, 143. 



Camharus, 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. 

 Chologasfer agassizii, 191. 

 Chromosomes, 41 ; in mutations, 



183. 

 Cleveiandia, 190. 

 Colapfes, 18. 

 Colour-blindness, 113 ; heredity of, 



108. 

 Colours, origin of, in domesticated 



breeds, 187. 

 Comb of fowls, uselessness of, 



133, 

 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. 



Dajila 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. 

 Doncaster, 110; on heredity in cats, 



117. 



248 



