The Cambridge natural history, Vol. 03 (of 10)Note 85 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionAnn. Mag. Nat. Hist. (2) ix. p. 498.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY