Many beds of limestone, belonging to the middle division of the Upper Silurian formation of the Island of Gotland, consist almost entirely of the fragments of a very large and peculiarly-shaped Brachiopodous shell. It may be regarded as one of most characteristic fossils of these Upper Silurian rocks. Perfect valves, giving a satisfactory view of its structure have never been found. When Mr. Davidson, with his usual kindness, sent me copies of the figures and descriptions given by Mr. Billings, of the new genus Trimerella, found in Canada, I had no hesitation in referring both the Canadian and the Gothlandic shells to the same genus. The materials obtained by Mr. Billings seem to have been more incomplete than mine; I have, therefore, been able to make some additions to the description given by him.

A few months ago both geologists and archæologists, and especially the latter, were surprised to hear of the discovery in the valley of the Little Ouse, between Thetford and Brandon, of certain cavities in beds of gravel, in which flint implements of the forms peculiar to the Palæolithic or river gravel were found, and which it seemed possible might have been the habitations of the early race of men who formed these implements.

In a paper published in the Proceedings of the Royal Society of London, Dr. Duncan has figured and described six new species of Carboniferous corals, belonging to the genus Hetero-phyllia of M'Coy, from specimens found in Scottish Carboniferous limestone strata. Of these species two H. Lyelli and H. mirabilis, seem to be founded on portions, which the careful examination of better preserved specimens would have shown to belong to only one good species.