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  The use of fire 165   Acheulean industry 166   The second period of arid climate 173   Late Acheulean implements 177   The Neanderthal race of Krapina 181   CHAPTER III   Close of the Third Interglacial 186   The Fourth Glacial Stage 188   Arctic tundra life 190   Environment of the Neanderthal race 196   Mammals hunted by the Neanderthals 202   Cave life 211   The Neanderthal race 214   Mousterian industry 244   Disappearance of the Neanderthals 256   CHAPTER IV   Opening of the Upper Palæolithic 260   The Grimaldi race 264   Arrival of the Crô-Magnons 269   Upper Palæolithic cultures 275   Upper Palæolithic races 278   Geography and climate 279   Mammalian life 284   The Crô-Magnon race 289   Burial customs 303   Aurignacian industry 305   The birth of art 315   Origin of the solutrean culture 330   Human fossils 333