CONTENTS. 



PART I. 



PAGE. 



Introduction 215 



Methods 218 



Currents 221 



Records of all stations and of a tank of sea-water 222 



Discussion 227 



PART II. 



Relation of oxygen tension and activity of the nervous system to metabolism in Cas- 



siopea 235 



On the chemical precipitation of CaCOs in sea-water 252 



Bibliography 258 



214 



