The Cambridge natural history, Vol. 03 (of 10)Note 100 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionAnimal Life, Intern. Scientif. Ser. ed. 1, p. 395.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY