INDEX. 



419 



Defective nutrition, 28, 24, 84. 



Defective proportion of limbs predispos- 

 ing to disease, 34. 



Deformities, heredity of, 57; caused by 

 living in dark apartments, 106. 



Development, arrest of, 292; of special 

 characters and scrofula, 116. 



Devon cattle, in-and-in breeding of, 148 ; 

 form of recorded pedigrees, 414. 



Diagram of Bates pedigrees, 144; of 

 Booth pedigrees, 14T ; pedigree of bull 

 Shakespeare, 143 ; of Duke of Airdrie, 

 142; of Goldsmith's Maid, 151; of me- 

 rino ram Gold Drop, 152; of New 

 York Mills Short-Horns, 145. 



Dickson, Dr., on consanguineous mar- 

 riages, 184. 



Digits, supernumerary and deficient, 50, 

 51. 



Disease, atavic, transmission of, 80; foetus 

 in utero liable to, 294 ; of one sex trans- 

 mitted by the other, 224 ; predisposing 

 and exciting causes of, 25, 26 ; varied 

 forms of, 25; heredity of, 22. 



Disposition inherited, 18. 



Dogs, acquired habits in, transmitted, 43 ; 

 inherited characters of, 40; wolf-like, 

 of Falkland islands, 45. 



Domestication favorable to fecundity, 110. 



Domesticated varieties more liable to va- 

 riation, 92. 



Dominant characters, 77; fixed by in- 

 breeding, 156 ; how made uniform, 220. 



Dominique fowls, in-breeding of, 167. 



Dorking fowls, fifth toe in, 52. 



Duck, bones in wild and tame, 101. 



Ducornet, the historical painter, 105. 



Duforet, Aug., case of, 51. 



Duke of Airdrie, pedigree of, 142,411. 



Dupuy, Dr., experiments of, with Guinea- 

 pigs, 59. 



Duration of life determined by heredity, 

 16. 



Dwarfs, case of children alternately, 74. 



Earle's, Dr., case of color-blindness, 19. 



Early breeders, practice of, 2 ; early ma- 

 turity, modified dentition from, 103; 

 shortens the period of gestation, 407. 



Ear, expression of, 871. 



Ears, small, in family of sheep, 54. 



Eggs, number of, in fowls, 87. 



Election In heredity, 79. 

 Embryo, development of^ 239. 

 Embryological development, law of, 291. 

 Endemic causes of variation, 106. 

 Epileptic Guinea-pigs, 58. 

 Equilibrium of the system defective in 



pampered animals, 91, 116. 

 Escutcheon of Guenon, 388. 

 Experiments with Guinea-pigs, 58. 

 External conformation, importance of, 



852. 



Eyelid, deformed. 53. 

 Eyes, tortoise-shell colored, hereditary, 



54. 



Family characters hereditary, 18, 44 ; how 

 produced, 103 ; variations in, 219 ; type 

 modified by engrafting new characters, 

 104, 161. 



Fancy points and prices, 845. 



Fat, excessive deposit not favorable to 

 health, 118. 



Fattening tendency hereditary, 15, 40. 



Fatty degeneration, 119-121 ; diathesis a 

 cause of impaired fecundity, 117-120. 



Fear of man in wild animals acquired, 45. 



Fecundation, of eggs in turtles, 279 ; pre- 

 cise time of, uncertain, 801. 



Fecundity, 108; depressing influences 

 favoring, 320 ; determined by heredity, 

 17, 88, 126; diminished, in young ani- 

 mals, 38, 118; impaired, restored by 

 selection, 170 ; influenced by quality of 

 food, 113 ; of animals in confinement, 

 108, 109 ; of merino sheep in England, 

 109 ; relation of size in animals to, 114; 

 of sheep in the Cordilleras, 109. 



Feed, better supply of, required by im- 

 proved breeds, 212. 



Feeding, experiments in, 5. 



Female, characters of, transmitted by 

 male, 230. 



Fertility diminished by over-feeding, 115. 



Fineness of wool-fibres, change in, 97. 



Finger, deformed, case of inheritance of, 

 57. 



Foetus in utero liable to disease, 294. 



Food, a variety of, required, 93 ; influence 

 of, in modifying animals, 96; supply 

 and fecundity, 114, 125. 



Form, an index of quality, 352 ; propor- 

 tions of, in meat- producing breeds, 358. 



