The Cambridge natural history, Vol. 03 (of 10)Note 80 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionAnn. Mag. Nat. Hist. (2) vi. p. 489.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY