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The Pamphlet Collection of Sir Robert Stout: Volume 22
Plantæ
Plantæ.
Algæ—
Melobcsia polymorpha.*
* This list has been prepared from the papers published by (1.) Mr C. W. Peach, (2.) Mr T. F. Jamieson, (3.) Messrs H. W. Crosskey and D. Robertson, (4.) Messrs G. S. Brady, H. W. Crosskey, and D. Robertson. The private collection belonging to Mr C. W. Peach has also been re-examined by one of the authors of this paper. For references to these papers, see Footnotes under section dealing with the previous literature of the subject.
Mr Jamieson, in his paper,* gives an analysis of the Mollusca from the Caithness boulder clay by J. Gwyn Jeffreys, F.E.S., who comes to the following conclusions:
61 per cent, are species now living on the west coast of Europe to the south of lat. 50°.†
80 per cent, are species now living on coasts of Britain.
88 per cent, are species now living on west coast of Europe between lat. 60° and the Arctic Circle.
84 per cent, are species now living on within the Arctic Circle.
55 per cent, are species now living on the east coast of N. America.
* Quart. Jour. Geol. Soc., pp. 278-280.
† Since the analysis was published (1866) the French explorations in the Ray of Biscay will no doubt have added to the percentage of the species coming under this category.