248 INDEX 
Giant Sloth, tracks at Carson City, 46 
Gilfort, Robert, 157 
Great Auk, extermination of, 232 
Grouse on Scotch moors, 235 
Hawkins, B. W., restorations by, 137 
Hesperornis, description of, 80 
impressions of feathers, 132 
position of legs, 83, 84 
restoration of, 82* 
Hippotherium, 166, 167 
Hoactzin, habits of, 74, '75* 
Horn does not petrify,: 130 
Horse, abundant in Pleistocene time, 164 
books on, 176 
of bronze age, 163, 167 
collections of fossil, 176 
development of, 167, 168,* 175 
differences between fossil and living, 163 
early domestication, 165 
evidence as to genealogy, 170-173 
extra-toed, 172, 173 
found in South America in 1530, 165 
of Julius Cesar, 172 
none found wild in historic times, 165 
Pliocene, 166 a 
possibility of existence in America up to the time — 
of its discovery, 169, 170 © | Wy 
primitive, 160, 161* 
