INTRODUCTION.
PHYSIOLOGICAL.
Charybdea.
Aurelia and Polyclonia (Cassiopœa)
Summary.
Aurelia and Polyclonia.
Cassiopœa.
Aurelia.
HISTOLOGICAL.
SUMMARY.
LITERATURE.
LITERATURE REFERRED TO IN THE SECTION ON PHYSIOLOGY.
LITERATURE REFERRED TO IN THE SECTION ON HISTOLOGY.
LITERATURE REFERRING TO THE CENTRAD CONTINUATIONS OF CILIA AND FLAGELLA.
REFERENCE LETTERS.
DESCRIPTION OF FIGURES.
