The Cambridge natural history, Vol. 03 (of 10)Note 28 — Chapter I · INTRODUCTION—POSITION OF MOLLUSCA IN THE ANIMAL KINGDOM—CLASSIFICATION—ORIGIN OF LAND AND FRESH-WATER MOLLUSCAReading editionE.g. Bergh, Zool. Jahrb. v. p. 1 f.◇Copy noteReturn to CHAPTER I INTRODUCTION—POSITION OF MOLLUSCA IN THE ANIMAL KINGDOM—CLASSIFICATION—ORIGIN OF LAND AND FRESH-WATER MOLLUSCA