The Cambridge natural history, Vol. 03 (of 10)Note 118 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionDr. R. E. Grant, Edinb. Phil. Journ. xiv. p. 188.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY