234 



EVOLUTION IN THE PAST 



Great Britain separated, 213 

 Grebes, in, 150 

 Greenland, 154 

 Ground-sloths. See Sloths 

 Grouse, Sand, 151 

 Willow, 200 

 Guillemots, 166 

 Gulls, 150, 166 



Gymnosperms. See Cycads, Conifers, 

 and various names 



H 



Hadrosaurus, 100 



Hag-fishes, 35 



Halitherium, 150 



Halysites, 29, 47 



Hares, 148 



Hartebeest, 178 



Hatteria. See Sphenodon 



Heart-urchins, 109 



Hedgehogs, 148 



Helicotoma, 24 



Helladotherium, 170 



Hemiaspis, 34 



Hemipters, 27 



Hermit-crabs, 137 



Heron, 131, 166 



Herring, 76, 105 



Hesperornis, 112 



Heterocercal tail, 42 



Himalayas, 138 



Hipparion, 170, 175, 182 



Hippidium, 203 



Hippopotamus, 177, 182, 189, 193 



Hippurites, 108 



Hoatzin, 3 



Holoptychius, 41 



Holothurians, 13, 17, 54 



Homo. See Man 



Homocercal tail, 41, 58, 64, 76, 88 



Hoopoes, 151 



Hoplopteryx, 106 



Hornbills, 132 



Hornets, 152 



Horse-mackerel, 106 



Horses 



Eocene, 120 



Oligocene, 143 



Miocene, 159 



Pliocene, Earlier, 170, 175, 1 80 



Horses (cont.) 



Pliocene, Later, 182, 185 



Pleistocene, 189, 193, 203 



Domesticated, 213 



Keltic type, 182 



South American, 203 



Thoroughbred, 176 

 " Horsetails." See Equisetales 

 Hyaena, 173, 184 

 Hysenodon, 128, 146, 156, 173 

 Hydra, 12 

 Hydrozoa. See Cladophora, Grapto- 



lites 



Hymenocaris, 19 

 Hyopotamus, 144 

 Hyracodon, 142 

 Hyracotherium, 121 

 Hyrax, 129 



Ibis, 131, 150 

 Ichthyornis, 112 

 Ichthyosaurs 



Triassic, 79 



Jurassic, 95 



Cretaceous, 102 

 Iguanodon, 98 

 Implements 



Eolithic, 1 88 



Palaeolithic, 195, 198, 199 209 



Neolithic, 212, 213 



Bronze, 214 



India, Early Pliocene, 173 

 Inostransevia, 63, 77 

 Insectivores 



Jurassic, 97 



Eocene, 118 



Oligocene, 148 



Miocene, 155 



(See also Hedgehogs, Moles, Shrews.) 

 Insects 



Ordovician, 27 



Devonian, 47 



Carboniferous, 52 



Triassic, 71 



Jurassic, 89 



Cretaceous, 114 



Oligocene, I5r 



(See also various names.) 

 Inter-glacial Epoch 



Europe, 192 



