Note 4 — BRUTE LIFE IN THE ALPINE REGIONS.[2]

Hügelgebiet, or hill-district. Although he devotes his book to the three upper circles, Dr Tschudi establishes in his mind, and occasionally refers to, a fourth—the hill or hillock district, below the 2500 feet above the sea at which he considers the mountains to begin. There can be little difference between the flora and fauna of this lowest circle and those of the plain itself.