The Cambridge natural history, Vol. 03 (of 10)Note 97 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionNachr. Deutsch. Malak. Gesell. xx. p. 146.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY