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, Olm, Siren Salamander; 



Common Frog - ... 456 



CHAPTER XXXIX. ANIMAL RESPIRATION AMPHIBIOUS 

 INVERTEBRATES 



MOLLUSCS (Mollusca) Origin of Land-Snails and Slugs Periwinkles, Apple- 

 Snails, &c. - 459 



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 



