Note 21 — Chapter I · INTRODUCTION—POSITION OF MOLLUSCA IN THE ANIMAL KINGDOM—CLASSIFICATION—ORIGIN OF LAND AND FRESH-WATER MOLLUSCA
Reading edition
Mendthal, Schr. Ges. Königsb., xxx. p. 27.
Reading edition
Mendthal, Schr. Ges. Königsb., xxx. p. 27.