| Dimetrodon | Frontispiece |
| FIGS. | | PAGE |
| 1, 2. | Engraved Cylinder of Red-Deer's Antler, from the Azilian (Elapho-Tarandian) Horizon of the Cavern of Lortet | 1 |
| 3. | A. Perforated Harpoon of the Azilian or Red-Deer Period. B. and C. Imperforate Harpoons or Lance Heads | 3 |
| 4. | Rolled Impression or "Development" of the Engraving on the Lortet Antler | 12 |
| 5. | Restoration (or Completion) of the Engraving on the Lortet Antler | 13 |
| 6. | Fragment of a Roughly-painted Vase of the Dipylon Age (circa 800 b.c.) from Tiryns | 23 |
| 7. | Engraving of a Mammoth drawn upon a Piece of Mammoth Ivory | 26 |
| 8. | Outline Engravings of Mammoths on the Wall of the Cavern known as the "Font de Gaume," near Eyzies (Dordogne) | 32 |
| 9. | Similar Engravings from the Neighbouring Cave of Combarelles | 32 |
| 10. | A, Similar Engraving from the Cave of Combarelles. B, Mammoth enclosed by Plank-like Structure–supposed to be either a Cage or a Trap | 33 |
| 11. | Horse (Wall Engraving), Cave of Marsoulas, Haute Garonne | 43 |
| 12. | Horse (Wall Engraving) Outline in Black, Cave of Niaux (AriÈge) | 43 |
| 13. | Horses: A, Wall Engraving (Cave of Hornos de la PÉna). B, Wall Engraving from Cavern of Combarelles. C, engraved on reindeer Antler (Mas d'Azil) | 43 |
| 14. | Drawing (of the Actual Size of the Original) of a Flat Carving in Shoulder-bone of a Horse's Head, showing Twisted Rope-bridle and Trappings | 45 |
| 15. | Drawing (of the Actual Size of the Original) of a fully rounded Carving in Reindeer's Antler of the Head of a Neighing Horse | 45 |
| 16. | Reindeer (Engraving on Schist) | 46 |
| 17. | Rhinoceros in Red Outline | 46 |
| 18. | Bison from the Roof of the Cavern of Altamira | 48 |
| 19. | Bison: Wall Engravings | 48 |
| 20. | Bear: Engraved on Stalagmite, from the Cave of Teyjat near Eyzies | 48 |
| 21. | Bear: Engraved on Stone, Massol (AriÈge) | 48 |
| 22. | Wolf: Engraved on Wall of the Cave of Combarelles | 48 |
| 23. | Wall Engraving of a Cave Lion (Combarelles) | 48 |
| 24. | Goose: Small Engraving on Reindeer Antler | 49 |
| 25. | Female Figure carved in Oolitic Limestone from Willendorf, near Krems, Lower Austria (1908) | 50 |
| 26. | Drawing (of the Actual Size of the Original) of an Ivory Carving (fully rounded) of a Female Head | 51 |
| 27. | Seated Figure of a Woman holding a Bovine Horn in the Right Hand | 51 |
| 28. | Male Figure represented in the Act of drawing a Bow or throwing a Spear | 51 |
| 29. | A Piece of Mammoth Ivory carved with Spirals and Scrolls from the Cave of Arudy (Hautes PyrÉnÉes) | 54 |
| 30. | SECRETS OF EARTH AND SEA
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