262 



INDEX 



Geese, coloration of young, 104, 106 



colour of egg, 153 



fledging of, 108 



longevity, 49 

 Genets, 85 

 Gharial, 144 

 Gibbons, 38, 201, 209 

 Gills, 17, 19 



Giraffe, 4, 11, 46, gi, 171 

 Glands, mammary, 183, 185 



sebaceous, 185 



skin glands in different animals, 184 



sweat, 185 

 Glochidium, 129 

 Glutton, 87 

 Gnu, 88, 219 



Goats, 75, 88, 170, 219, 247 

 Goat-sucker, 169 

 Goldfish, 205 



Gorilla, 7, 8, 38, 40, 207, 208 

 Grades of coloration, 69 

 Grape-sugar, 186 

 Grasshopper, 124 

 Grass-snake, 184 

 Grebes, 102, 106, 153, 160 

 Green, attraction of young mammals for, 



243 

 Green-fly, 54 



Green plants, food of, 183 

 Gregarious animals, 71 

 Gregariousness, 145, 177, 207, 252 

 Greyhound, duration of youth, 42 

 Grey matter of brain, 229, 237 

 Grilse, 53 



Grizzly bear, moult of, 86 

 Groos, Professor, 246 

 Ground-parrot, nest, 149 

 Growth-patterns, 65, 105 

 Growth, rate of, 47, 48, 223 

 Grubs, 127, 128 

 Guemal deer, coloration, 92 

 Guillemots, colour of eggs, 154 

 Guinea-pigs, 46, 176 

 Gulf Stream, 137 

 Gulls, coloration of young, 102, 107 



colour of eggs, 154 



food of young, 163 



learning to swim, 240 



longevity of, 49 



Gymnarchus niloticus, 136 



Hagenbeck, Carl, loi, 212 



Hag-fish, secretion of mucus, 184 



Hair of immature animals, 81 



Hammerkop, 150 



Hamsters, 176 



Hand-feeding, i8g 



Handling of young animals, 219 



Hare, 3, 46, 75, 77, 78, 176, 178 



Hartebeeste, 88 



Harvest-mouse, 176 



Hawfinch, nest of, 150 



Hawks, young, 102, 103 



Heat, radiation of, 67 



Hedgehog, 175, 220 



Hemipode, plumage of female, 109 



Hen pheasants, plumage of, 108 



Herbivores, milk of, 187 



Herons, 150 



Herring, 117, 135,222 



Hessian-fly, 59 



Heterotis niloticus, nesting habits, 136 



Hibernation of polar bear, 168 



Hippocampus, brood-pouch figured, 137 



Hippopotamus, 11,45,93, 171. i72i i75t 



218 

 Hoatzin, 241 

 Hog-deer, 92 

 Hog, pygmy, 93 

 Hoopoo, 149, 154 

 Hornbill, 103, 149, 151, 153, 158 

 Horns, 12, 13 



Horses, 45, 81, 93, 95, 172, 184, 190, 217 

 Huanaco, 93, 218 

 Hudson, W. H., 148 

 Human death-rate, n6 

 Human race, 182 

 Humming-bird, 49, 103 

 Hunger, 168, 188 

 Hunting-spider, 122 

 Hysenas, 10, 86 

 Hydra, 232, 236 

 Hyla, 140, 142 

 Hyrax, 173, 184 



tame, 44, 216, 241, 247, 250, 251 



Ibis, iio, 154 

 Ichneumon-flies, 127 



