ILLUSTRATIONS. 



B'IGi PAGE 



THE THREE BRITISH SPECIES . . . Frontispiece 



1. HEADS OF THE THREE BRITISH SERPENTS . . 4 



2. TROPIDONOTUS NATRIX, OR RING SNAKE (24£ INCHES) 



3. RING SNAKE (3£ FEET, CORNWALL) 



4. RING SNAKE WITH BLUNT TAIL . 



5. HEAD PLATES OF RING SNAKE 

 PLAN OF LOCALITY, PLAGUE OF SNAKES . 



6. YOUNG RING SNAKE FOUND IN DEBRIS OF WALL 



7. EGGS FOUND IN OLD WALL 



8. CORONELLA AUSTRIACA, OR SMOOTH SNAKE 



9. HEAD PLATES OF SMOOTH SNAKE 



10. SMOOTH SNAKE ..... 



11. EYE-COVERING OF ADDER. 



12. SLOUGH OF AN ADDER .... 



13. V-MARKS OF ADDERS .... 



14. SIDE-MARKINGS OF ADDER 



15. BANDED MARKING ON ADDER 



16. SLOW- WORMS ..... 



17. MALE ADDER (24 INCHES) CAUGHT AT SKENFRITH, 



JUNE 1898 ...... 



18. MALE ADDER (25$ INCHES) SWALLOWING A SLOW-WORM 



19. THE PROCESS OF SWALLOWING LARGE ARTICLES OF DIET 



IN ADDERS ...... 



12 

 15 



17 

 24 

 32 

 35 

 36 

 45 

 47 

 58 

 68 

 71 

 79 

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 81 

 84 



85 



89 



91 



