CONTENTS OF FOURTH BOOK OF NATURAL HISTORY. 



LESSON V. 



FISHES. 



Class of Fishes. General Characters. Form. Integuments. Skeleton 

 Muscular Apparatus. Swimming -Bladder. Senses. Apparatus 01 

 Digestion. Circulation. Respiration. Animal Electricity. Habits. 

 Fishing. Classification. 



LESSON VI. 



Order of Acanthopterygians. Family of Percoides, (Perches, Rockfish.) 

 Family of Mulloides, (Red-Mullets, Flying-fishes.) Family of Mailed- 

 cheeks. Family of Scienoides, Family of Sparoides. Family of 

 Menides. Family of Squamipennes. Family of Labyrinthiform 

 Pharyngeals. Family of Scomberoides, ( Mackerel. Mackerel 

 Fishery. Tunny. Sword- Fish, &c. 



LESSON VII. 



Order of Abdominal Malacopterygians. Division. 



Family of Cyprinoides. Carp. Gold-fish. Gudgeon. Tench, See 



Family of Esoces. Pike. Exocets, or Flying-fishes. 



Family of Siluroides. Electric Silurus, &c. 



Family of Salmonides. Common Salmon. Salmon Fishing. Trout. 



Smelt. 

 Family of Clupese. Herrings. Herring Fishing. Shad. Sardines. 



Anchovies, &c. 



LESSON VIII. 



Order of Subbrachian Malacopterygians. Family of Gadoides. Cods. 

 Common Cod. Cod Fishery. Whiting. Hake. Ling. 



Family of Pleuronectes. Organization. Plaice. Turbot. Sole. Family 

 of Discoboli. 



Family of Echeneis. Remora, or Sucking-fish. 



Order of Apodous Malacopterygians. Eels. Common Eel. Sea Eel. 

 Gymnotus Electricus. 



Order of Lophobranchians. Organization. Hippocampus. 



Order of Plectognathi. Organization. Diodon. Trunk-fish. 



LESSON IX. 



Division of Cartilaginous Fishes, or Chondropterygians. Organization. 

 Order of Sturiones. Sturgeons.. Caviar Fish-glue. 

 Order of Selachii. Sharks. Saw-fish. Rays. Torpedo. 

 Order of Cyclostomi. Lampreys. Myxines. 



