CONTENTS 
CHAPTER TI. 
THE LIFE OF THE FISH (Lepomis megalotis). 
PAGE 
What is a Fish ?—The Long-eared Sunfish.—Form of the Fish.—Face of the 
Fish.—How the Fish Breathes.—Teeth of the Fish.—How the Fish Sees. 
—Color of the Fish.—The Lateral Line.—The Fins of the Fish.—The 
Skeleton of the Fish—The Fish in Action—The Air-bladder.—The 
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CHAPTER II. 
THE EXTERIOR OF THE FISH. 
Form of Body.—Measurement of the Fish—The Scales or Exoskeleton.— 
Ctenoid and Cycloid Scales ——Placoid Scales —Bony and Prickly Scales. 
—Lateral Line.—Function of the Lateral Line.—The Fins of Fishes.— 
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CHAPTER III. 
THE DISSECTION OF THE FISH. 
The Blue-green Sunfish.—The Viscera.—Organs of Nutrition.—The Alimen- 
tary Canal.—The Spiral Valve,—Length of the Intestine.—The Eggs of } 
Bishes:— Protection ol thesVouny.. 6 cic ass ssicis cece se eceeuene cs 26 
CHAPTER IV. 
INSTINCTS, HABITS, AND ADAPTATIONS. 
The Habits of Fishes.—Irritability of Animals.—Nerve-cells and Fibers.— 
The Brain or Sensorium.—Reflex Action.—Instinct.—Classification of 
Instincts.—Variability of Instincts —Adaptations to Environment.— 
Flight of Fishes —Quiescent Fishes.——Migratory Fishes.—Anadromous 
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CHAPTER V. | 
ADAPTATIONS OF FISHES. 
Spines of the Catfishes—Venomous Spines.—The Lancet of the Surgeon- 
fish.—Spines of the Sting-ray.—Protection through Poisonous Flesh of 
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