viii CONTENTS. 



CHAPTER VI. ARTHROPOD A. 



VAGK 



10. Astacus (Crayfish), ... .83 



Other Crustacea, ... .107 



CHAPTER Vll. MOLLUSC A. 



11. Anodonta and Unio (Fresh Water Mussels), . .109 



12. Helix (Snail), . . . . . .122 



CHAPTER VIII. VERTEBRATA ACRANIA. 

 13. Amphioxus (Lancelet), .... .134 



CHAPTER IX. PISCES (Fishes). 

 > 14. Scyllium (Dogtish), . .153 



CHAPTER X. AMPHIBIA. 

 15. Raiia (Frog), ....... 174 



CHAPTER XI. AVES (Birds). 

 . 1. Columba livia and Gallus bankiva (Pigeon and Fowl), . . 229 



CHAPTER XII. MAMMALIA. 

 17. Lepus cuniculus (Rabbit), . . . . .268 



CHAPTER XIII. COMPARATIVE ANIMAL MORPHOLOGY AND PHYSIO- 

 LOGY, 310 



CHAPTER XIV. MAN, ...... 321 



CHAPTER XV. CLASSIFICATION AND DISTRIBUTION OF ANIMALS, , 339 



