The Snakes of Europe

by George Albert Boulenger

11. Cœlopeltis monspessulana (West Coast, Greece, and islands).

12. Tarbophis fallax (West Coast, Greece and islands, Constantinople).

13. Vipera ursinii (Bulgaria, Bosnia, Herzegovina, Montenegro).

14. Vipera berus (Bosnia, Herzegovina, Roumania).

15. Vipera aspis (Bosnia).

16. Vipera ammodytes.

17. Vipera lebetina (Cyclades).

X. Russia

1. Tropidonotus natrix (as far north as 60°).

2. Tropidonotus tessellatus (south).