Note 168 — Chapter VII · REMARKS ON THE DISTRIBUTION OF MARINE AND FRESH-WATER CRUSTACEA

Mr. C. H. Martin points out to me that in the Scottish lochs, which from their geological nature are evidently not connected with subterranean waters, none of them nor similar forms occur; nor do they in the Tasmanian lakes which are on igneous diabase, so that Forel’s conclusion would seem to be of wide application.