126 INTRODUCTION 



4. Coronella austriaca. 



5. Vipera bents. 



6. Vipera aspis (Black Forest, Lorraine). 



V. France and Switzerland, exclusive of 



Ticino 



1. Tropidonotus natrix. 



2. Tropidonotus viperinus (as far north as South 

 Brittany and Fontainebleau). 



3. Zamenis gemonensis (south, locally as far north 

 as the Sarthe and Aube). 



4. Coluber longissimus (locally as far north as 

 South Brittany, South Normandy, and Fontaine- 

 bleau). 



5. Coluber scalaris (Mediterranean Littoral), 



6. Coronella austriaca. 



7. Coronella girondica (south and west as far 

 north as the Charente-Inferieure). 



8. Ccelopeltis monspessulana (Mediterranean Lit- 

 toral). 



g. Vipera ursinii (Basses-Alpes). 



10. Vipera bents (as far south as the Loire basin, 

 the Central Plateau, and the Alps). 



11. Vipera aspis (as far north as the Loire basin, 

 Fontainebleau, and Lorraine). 



VI. Spain and Portugal 



1. Tropidonotus natrix. 



2. Tropidonotus viperinus. 



