Note 22 — Chapter I · INTRODUCTION—POSITION OF MOLLUSCA IN THE ANIMAL KINGDOM—CLASSIFICATION—ORIGIN OF LAND AND FRESH-WATER MOLLUSCA
Reading edition
SB. K. Akad. Wiss. Wien, 1889, p. 4, but the view is not universally accepted.
Reading edition
SB. K. Akad. Wiss. Wien, 1889, p. 4, but the view is not universally accepted.