| FIG. | PAGE |
| THE OCTOPUS (Octopus vulgaris) | [Frontispiece]. |
| 1. THE PAPER NAUTILUS (Argonauta Argo) | [5] |
| 2. SUCKER OF THE OCTOPUS | [21] |
| 3. MANDIBLES OF THE OCTOPUS | [25] |
| 4. TONGUE OF THE OCTOPUS | [26] |
| 5. THE OCTOPUS SWIMMING | [28] |
| 6. EGGS OF THE OCTOPUS | [58] |
| 7. THE COMMON CUTTLE-FISH (Sepia officinalis) | [67] |
| 8. SEPIOLA RONDELETII | [70] |
| 9. THE COMMON SQUID (Loligo vulgaris) | [71] |
| 10. EGGS OF THE CUTTLE-FISH (Sepia officinalis) | [73] |
| 11. SPAWN OF THE COMMON SQUID (Loligo vulgaris) | [76] |
| 12. FAC-SIMILE OF DE MONTFORT’S “Poulpe Colossal” | [101] |