viii CONTENTS 



CYCLOSTOMATA AND FISHES 

 CHAPTER V 



PAOE 



THE SYSTEMATIC POSITION AND CLASSIFICATION OF FISHES . . .141 



CHAPTER VI 



EXTERNAL CHARACTERS OF CYCLOSTOMATA AND OF FISHES : EXTERNAL 

 CHARACTERS COLORATION POISON GLANDS AND POISON SPINES 

 PHOSPHORESCENT ORGANS ......... 150 



CHAPTER VII 

 THE SKIN AND SCALES 182 



CHAPTER VIII 

 THE SKELETON . 193 



CHAPTER IX 

 THE DENTITION, ALIMENTARY CANAL, AND DIGESTIVE GLANDS . . . 247 



CHAPTER X 

 THE RESPIRATORY ORGANS 277 



CHAPTER XI 

 THE AIR-BLADDER 297 



CHAPTER XII 



THE VASCULAR SYSTEM, THE LYMPHATICS, AND THE BLOOD-GLANDS . . 313 



CHAPTER XIII 



MUSCULAR SYSTEM LOCOMOTION SOUND -PRODUCING ORGANS ELECTRIC 



ORGANS 349 



. 



CHAPTER XIV 



NERVOUS SYSTEM AND ORGANS OF SPECIAL SENSK 367 



