INDEX 249 



Horse, sketched by primitive man, 163 



teeth of, 170 



three- toed, 166 

 Humming-bird, exterminated by hurricane, 231 

 Hydrarchus, 62* 

 Hyracotherium, 160, 161,* 170, 174 



Ichthyosaurs, silhouettes of, 132 

 Iguanodons, found at Bernissart, 104 

 Impressions of feathers, 131 



of scales, 131 



of skin, 131 

 Inbreeding, effects of, 231, 232 

 Information, sources of, xvi 

 Innuits, habits, 192 ' 



Interdependence of animals and plants, 234, 235, 238 

 Ivory, fossil, 2, 4, 188, 189 



Jaw of Mosasaur, 54* 

 of reptiles, 53 



Killing of the Mammoth, story, 177, 193 

 Kimmswick, deposit of Mastodon bones, 209 

 Knight, Charles R., restorations by, xviii, 136 

 Koch's Hydrarchus, 61, 62* 

 Missourium, 207,* 208 



Leaves, impressions of, 3, 13 

 Leg of Brontornis, 149* 



