Note 26 — Chapter VI · THE DISTRIBUTION AND THE ÆTIOLOGY OF THE CRAYFISHES.
Reading edition
Kessler (Die Russischen Flusskrebse, l. c. p. 369–70), has an interesting discussion of this question.
Reading edition
Kessler (Die Russischen Flusskrebse, l. c. p. 369–70), has an interesting discussion of this question.