The Cambridge natural history, Vol. 03 (of 10)Note 104 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionRev. L. Jenyns, Observations in Nat. Hist. p. 318.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY