General Index 



Goldfish, 72-3 



Gonad, limited life of, 3 1 -2 



ageing of, 173-4, 177 ff. 

 Gonadotropin, pituitary, 179, 181, 



187, 188 

 Gonopodium, 182 

 Goose, 50 



Grafts, 171, 179, 180, 199 

 Gravity, 7 

 Growth, 8, 10, 12, 14, 150, 153 ff. 



asymptotic and indeterminate, 65 



cessation, 67-8, 139, 141, 160 



of Crustacea, 96 



of Daphnia, 92 



of Emys, 78 



offish, 71 ff. 



hormones and, 182 



human, 153, 182 ff., 196 



of Lebistes, 74 



of molluscs, 105 ff. 



at puberty, 183 



rapid, effect on longevity, 152, 

 196 



retarded, effect on longevity, 

 187 ff. 

 Growth curve, 10, 159 

 Growth hormone, pituitary, 152, 



153, 161, 182, 184 ff., 187 

 Growth potential, decline of, 11, 



30-1 

 Growth rate, experimental alteration 



in invertebrates, 143-8 



in fish, 74-5 



in mammals, 148 ff. 



in man, 152, 196 

 Growth-rings, 55, 107 

 Guinea pig, 47, 125, 126 

 Gull, herring, 50, 109 

 Guppy, 74-7 



Hamster, golden, 47 

 Harvey, William, 62 

 Hatchability, 124 

 Hawk-moth, 132 



Health, general, inheritance, 125 

 Heart rate, in Cladocera, 26, 29, 32 

 in man, 32 



Heat production, decline, 33, 187 



Helicids, 105 



Herbivores, 47 



Heredity, and longevity in man, 



122 ff. 

 Heron, night, 27, 44 

 Heterauxesis, endocellular, 166 

 Heterogametic sex, vigour of, 1 30 

 Heterosis, 127-30, 136 

 Heterozygote, fitness of, 123, 129 

 Hibernation, artificial, 195 

 Hippopotamus, 46 

 Homoeostasis, 36-7, 148, 175-7 

 Homoeothermy, 14, 161 

 Homogametic sex, vigour of, 130 

 Hormones (see individual hormones) 



and growth regulation, 182 ff. 



in insect development, 146 



and senescence, 171 ff. 

 Horse, 46, 48 

 Hufeland, 22, 133 

 Hutchinson-Gilford syndrome, 134 

 Hybrids 



use in research, 136 



vigour of, 127-30, 136 

 Hydranths, 82 

 Hydration, increased, 30 

 Hydroids, 81-3 

 Hydromedusae, 32, 81 

 Hymenoptera, 57 

 Hypophysectomy, 153, 187 

 Hypophysis, 174 

 Hypoplasia, organ-, in rats, 26 



Ibis, African, 27, 44 



Imago, insect, 34, 35, 92, 97, 98, 196 



'Immortality' 



of germ-plasm, 5 



'potential', 21, 116, 191 

 Immunology, and senescence, 170 

 Inbred animals, variability, 136 

 Inbreeding depression, 118, 127 ff. 

 Infant mortality, 21 

 Inflection, of growth-curve, 159 

 Inhibitors, growth-, 154-5 

 Injuries, accumulation of, 35, 36, 64 

 Insectivores, 47 



248 



