CONTENTS. 



CHAPTER I. 



CHARACTERS OF VERTEBRATE ANIMALS. ACRANIA. 



PAGH 

 The Vertebrate Body Notochord Skeleton Amphioxus. . I 



CHAPTER II. 



CRANIOTA. 



The Brain and Skull Visceral Arches Limbs Ribs Liver- 

 Heart Segmentation 6 



CHAPTER III. 



CLASS I. PISCES (FISHES). 



General Characters Scales Fins Lateral Line Skeleton- 

 Brain Gills and Breathing Swimming Bladder Eggs . II 



CHAPTER IV. 



ORDER I. LAMPREYS. ORDER 2. SHARKS. 



Lampreys or Marsipobranchs Selachia or Sharks Placoid 

 Scales -Egg Capsules Sawfishes Skates ... 22 

 a 



