Grammatizing _v._ naturalizing in decorative art, 202, 203 Grouse, the red and allied species, 116, 117 Harpoons of Azilian and Magdalenian period, 3 Horses, cave-men's pictures of, 43, 45 Horses' heads drawn with bridle or halter, 44, 45 Hybrids, 131-138 among allied species of fish, 133, 134 infertile and fertile, 134, 135 Inter-Glacial climate and animals, 9 Kaleidoscope, the living organism compared to a, 112 Kelvin, Lord, on the origin of life, 186 Kipling, Mr. Rudyard, on primitive man, 4 Koban necropolis, swastikas from, 196 Lake dwellings of Switzerland, 4 Lalanne, M., discovery by, of human statuettes, 50 Laussel, rock-shelter of, human statuettes from, 50 Life-saving qualities not alone survive in nature, 127 Lime-juice, action of, was not understood, 231 and scurvy, 229-237 on long voyages, 231 shown to be effective when prepared from the true lemon, 236 the original lime-juice was lemon-juice, not the juice of the sour-lime, 236 when prepared from West Indian sour-lime not effective, 232 Linnæus, his method of naming and classifying animals and plants, 99 Lion, wall engraving of, 48 Lister Institute, investigations carried on there, 233 Lodge, Sir Oliver, on life, 185 Lortet, cavern of, 1 Mammoth, engraving of, on ivory, from the cave of La Madeleine, 26 Mammoths, engravings of, on walls of caves, 32, 33 Man, Isle of, and the Sicilian three-legged emblem, 203 Mantell, Dr. Gideon, discoverer of gigantic extinct reptiles, 84 Marsh-gas, 220 Milne-Edwards, Alphonse, his proposed experiment on cross-breeding of races and species, 141 Miscegenation or cross-breeding of human races, 148-156 Monaco, Prince of, his researches and publications, 29 Mongrels defined as distinct from hybrids, 138, 145 may exhibit fine qualities, 147 Monsters, 132 Mules between horse and ass, 103 Mykenæan age, swastikas of, illustrated, 194, 195 Neander men, 8 Negro with European features disliked by other negroes, 155 Neolithic people, 10 Ogee, a vague term, 215 swastika, so-called, 210, 213 Oil, boring for, 223 Oil-boring industry, 226 Oil-shales, 227 Okapi of the Congo Forest, not a hybrid, 133 Olefines, 224 Osborn, Rev. Lord Sydney Godolphin, 179 Pairing as a test of species, 101, 131 Palæolithic or ancient Stone Age, 5 Papilio, the genus of swallow-tailed butterflies, 97 Paraffin series, 224 Peat, 219 Pedalion, the leg-bearing wheel animalcule, 161, 163 to be compared with young of certain prawns, 164 Petroleum, the name invented in 1855 by Prof. Silliman, 225 Pictet and de Candolle on suspended animation, 175 Picture, the earliest, in the world, 1-25 of the Three Red Deer, 12, 13 Piette, Edouard, his excavations of caves, 1 Pigs and the paint-root, 119, 145 Pimpernel, red and blue, will not inter-breed, 145