A Comparison, with corresponding parts of existing species of Castor, of specimens of mandible and mandibular teeth of a large beaver-like quadruped, obtained from the fresh-water deposits called the ‘Forest-bed’ on the Borfolk coast, led me, in 1845, to the conclusion signified by the adoption of Fischer's generic appellation, Trogontherium, for the rodent, which seemed to exemplify “ an extinct aub-generic type” of Castoridæ.

I Wish, through, the medium of your pages, to call the attention of Geologists to an important point in the Geology of the English Lake District.

Having a short time since drawn up a brief statement of the evidences upon which the presumed antiquity of the human race in Western Europe is based, and also some account of the animals found associated with early man in this region, I have ventured to think it may be found of sufficient interest to lay before this Society.

Some portions of the Lancashire coast in the Furness district give evidence of considerable changes of level since the first elevation of the Glacial deposits. The Boulder-clay formation of Cumberland and Lancashire exhibits a well-marked subdivision into a lowertough blue Boulder-clay, overlain, apparently on its eroded surface, by a redder silty clay of more variable composition. The same subdivision holds good along the coast of N. Wales; but I cannot satisfy myself that it can be definitely correlated with the succession of the Glacial series of the Norfolk and Suffolk coasts, or that the lower tough blue Clay can be traced inland much above highwater level.

In my former note on the discovery of Bos primigenius in the Lower Boulder-clay, I stated that there was some “slight twisting and confusion” of the stratified deposits below the superincumbent Boulder-clay, which might have been caused by the pressure of glacier-ice. As the crumpling of sandi clay, and gravel, below Till, is by no means uncommon, and has frequently been described, I did not think it worth while at the time to give any drawing of the contortions exposed in the new railway cutting. But some geological friends having asked me about the character of these crumplings, it may not be out of place if I now add a few particulars. "When my former note was written the disturbed portions of the stratified deposits were not very well exposed, and consequently I did not in my communication lay much stress upon their occurrence, although I had little doubt as to their origin. Upon visiting the section some weeks later, however, I found the crumplings well displayed. In October last I saw them again, in company with my brother, Mr. A. Geikie. By that time the section had been still better developed, and the annexed sketch of a portion of the crumpled clays was made.