TABLE OF CONTENTS.

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]