CONTENTS 



CHAPTER PAGE 



I. A SHORT HISTORY OF THE INVESTIGATIONS . 1 

 II. THE PHYSICAL CONDITIONS OF THE ABYSS . .17 



III. THE RELATIONS OF THE ABYSMAL ZONE AND THE 



ORIGIN OF ITS FAUNA 45 



IV. THE CHARACTERS OF THE DEEP-SEA FAUNA . 59 



V. THE PROTOZOA, CCELENTERA, AND ECHINODERMA 



OF THE DEEP SEA 86 



VI. THE VERMES AND MOLLUSCA OF THE DEEP SEA 109 

 VII. THE ARTHROPODA OF THE DEEP SEA . . . 123 



VIII. THE FISH OF THE DEEP SEA 148 



INDEX 167 



33567 



