1. Mermen of the Northern Waters -- 2. Mermen of Russia and the Slavic countries -- 3. Mermen of the British Isles -- 4. Mermen of Southern Europe -- 5. Mermen of Asia -- 6. Mermen of the Middle East -- 7. Mermen of Africa -- 8. Mermen of the Pacific Islands -- 9. Mermen of the New World.