X CONTENTS 



CHAPTER XXXVIII.— ANIMAL RESPIRATION— AMPHIBIOUS 

 VERTEBRATES 



Page 



Fishes (Pisces)— Eel, Carp, Tench, Mud-Skippers, Bleak, Roach, Loach, Snake- 

 headed Fishes, Climbing Perch; Evolution of the Lungs of Backboned Animals, 

 Lung-Fishes _.... 447 



Amphibians (Amphibia) — Hell-Bender, Giant Salamander, 01m, Siren Salamander; 



Common Frog ------------- 456 



CHAPTER XXXIX.— ANIMAL RESPIRATION— AMPHIBIOUS 

 INVERTEBRATES 



Molluscs (MoUusca)— Origin of Land-Snails and Slugs — Periwinkles, Apple- 

 Snails, &C. ------------- 45g 



Insects (Insecta) — Net- Winged Insects (Neuroptera) — Stone-Flies, Dragon-Flies, 

 May-flies, Alder-Flies, Caddis-Flies ; Two-Winged Insects (Diptera) — Midges, 

 Sand-Midges ------------- 462 



Crustaceans (Crustacea) — Shore-Crabs, Robber-Crab ------ 469 



