On the most Northerly Latitude at which Land and Freshwater Molluscs have hitherto been found

Abstract

I AM very sorry that I have involuntarily made a mistake in a letter to Mr. Oscar Dickson (NATURE, vol. xiii. p. 96), in which it is stated that Dr. Stuxberg had found a Physa on the most northerly locality from which land and freshwater molluscs have hitherto been obtained. When I made this statement I had not Middendorff's “Sibiritche Reise” with me, and I did not then remember that this celebrated naturalist had found a species of the same genus on the Taimur peninsula north of the seventy-third degree N.L.