| PAGE |
| INTRODUCTION | [1] |
| [PART I]: SYSTEMATIC | [3] |
| Family I: Charybdeidæ | [3] |
| Charybdea Xaymacana | [4] |
| “ II: Chirodropidæ | [4] |
| “ III: Tripedalidæ | [5] |
| Tripedalia cystophora | [5] |
| [PART II]: GENERAL DESCRIPTION OF THE ANATOMY OF THE CUBOMEDUSÆ | [7] |
| A. Charybdea Xaymacana | [7] |
| a. Environment and Habit of Life | [7] |
| b. External Anatomy | [8] |
| 2. Form of Bell | [8] |
| 3. Pedalia | [8] |
| 4. Sensory Clubs | [9] |
| 5. The Bell Cavity and its Structures | [10] |
| (a) Proboscis | [11] |
| (b) Suspensoria, or Mesogonia | [11] |
| (c) Interradial funnels, or funnel cavities | [11] |
| (d) Velarium | [12] |
| (e) Frenula | [12] |
| (f) Musculature | [12] |
| (g) Nerve ring | [13] |
| c. Internal Anatomy | [13] |
| 6. Stomach | [13] |
| 7. Phacelli | [14] |
| 8. Peripheral Part of the Gastro-Vascular System | [14] |
| (a) Stomach Pockets (Valves and Mesogonial Pockets) | [14] |
| (b) Marginal Pockets | [17] |
| (c) Canals of the Sensory Clubs and Tentacles | [17] |
| 9. Reproductive Organs | [19] |
| 10. Floating and Wandering Cells | [20] |
| B. Tripedalia Cystophora | [22] |
| a. Habitat | [22] |
| b. External Anatomy | [23] |
| c. Internal Anatomy | [24] |
| [PART III]: DESCRIPTION OF SPECIAL PARTS OF THE ANATOMY | [27] |
| A. Vascular Lamellæ | [27] |
| B. Nervous System | [37] |
| LITERATURE | [57] |
| TABLE OF REFERENCE LETTERS | [58] |
| DESCRIPTION OF FIGURES | [60] |