INDEX 



261 



Eggs, butterflies, 129 



fish, 52, 115, 130, 134, 138 



mammals, 163 



marine animals, 117 



reptiles, 142, 145, 163 

 Elands, 46, 90, 219 

 Elasmobranch, 138 

 Eld's deer, 92 

 Elephants, breeding, 115, 173 



domestication, 216 

 ' duration of youth, 43 



intelligence, 44 



size and weight, 43 



skin gland, 184 



taming, 216 



training, 44 



young, II, 95 

 Elephant-seal, 194, 214 

 Elk, 46, 92 

 Embryology, 222 

 Embryos, 129, 139, 142, 163, 224 

 Emotions, 182 



Emu, loi, 105, 149, 154, 161, 183 

 Endowment, natural, 229 

 Environment, 223, 238 

 Evolution, 36, 222, 223, 239 

 Excretion, 67, 113, 161 

 Experience, 235-237, 239, 242, 245 



Family, limitation of, 115, 118, 131, 134, 



142, 148 

 Fantang, 136 



Fascination by snakes, 202 

 Fatigue, 230 

 Fat in milk, 186 

 Fawns, 219 

 Fear, of man, 214 



of snakes, 200 

 Feathers, 83, 97, 98 

 Feeding, artificial, 190 



by spoon, i8g 



of reptiles, 197 



of young animals, 188 

 Feeding-bottles, 189 

 Females with male plumage, 70, 109 

 Ferrets, 169 

 Fieldmouse, 175 

 Fight, lion and tiger, 249 

 Fighting of young animals, 249 



Finches, food of young, 161 



nests of, 156 

 Fish, ancestral history, 21 



annual rings, 52 



brood-care, 139 



contact reactions, 233 



development of, 222 



eggs o^ 52 



fertility, 134 



instincts modified by brood -care, 139 



mucous glands of, 184 



rate of growth, 51 



sexual coloration, 70 



temperature of, 50 



typical shape of, 21 

 Fish-lice, brood-care, 120 

 Flamingo, 49, 104, iii, 151, 1 53 

 Flat-fish, metamorphosis, 21 

 Fleas as parasites, 82 

 Flies, green, 54 

 Flight of birds, 97, 242 

 Fly, 31, 55 

 Fly-catcher, m 

 Foals, 94, 172 

 Foetus, 9 



Fontainebleau, 205 



Food, 48, 161, 183, 188, 194, 236, 239, 242 

 Forest animals, 77 

 Fossils, 64 



Fowls, 69, 107, 108, 222 

 Fox, 86 

 Freewill, 237 



Freiburg, University of, 60 

 Frigate-birds, 153 

 Frog-mouth, 153 



Frogs, 15, 17, 51, 59, 75. 140, 184, 231 

 Fruit-pigeon, iii 

 Fur, 83 

 Fur-seal, 42 



Gahan, C. J., 56 



Gall-flies, 127 



Gall-midges, 59 



Game-birds, 101, 103, 106, 112, 153 



Games of young animals, 246 



Gannets, 102, 116 



Garden-spider, 122 



Gayal, 88 



Gazelles, 89, 219, 247 



