CONTENTS 
CHAPTER I. 
THE LIFE OF THE FISH (Lepomis megalotis). 
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 
Brain of the Fish:—The’ Fish's: Nest)... e2cees au. ete eee be dee ds 
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.— 
IMadS CLES 5 fast water. c fires a esse et a he aN Me atta ok ait aaa een merit a as ee 
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 
Fishes.—Protection of the Young... «2... ... cece eee eee eee 
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 
Fishes ===Pupriacity: Of Fishes... 3 c.0.sdaneaun she aus ace deusaiaca aver ined Maks 
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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