Amongst the Carboniferous corals, not the least interesting are those species which, for one reason or another, may be difficult to classify, or at any rate diverge somewhat from the common order. It is with one of these aberrant members that the present communication is concerned; and it is, perhaps, not altogether unfitting that most of the material happens to be of Irish origin.

The three genera (or generic terms) that serve for the title of this paper comprise a series of Cretaceous and Tertiary Echinoids which are morphologically similar, and, in consequence, systematically chaotic. Although the time is not yet ripe for an attempt to disentangle the nomenclature of the various genera and species from the knot in which it is involved (a condition not to be wondered at in view of the early description and variable qualities of the forms), it seems desirable to publish the following comments on the group, making use of current names for the examples quoted. Pyrina, Desmoulius, as Lambert has shown, is typified by P. pelrocoriensis, Desm., a species that might well pass for a young member of the Conulus series. Conulus, Leske, has for genotype C. albogalerus, Leske, and the forms to which that name is usually applied in this country seem sufficiently like the original figure to pass muster. The genotype of Echinonëus is of course E. cyclostomus, Leske, and there has never been serious confusion as to the application of the generic name.

Conditions of Deposition — Former Presence of Sulphates — Formation of “ Demagnesified ” Rocks—Development of Concretionary and Segregated Structures, etc.

‘Terebella’ cancellata was the name given to some supposed worm-tubes from the Cenomanian of the East and South-east of England, in the Geological Magazine for December, 1911 (p. 553, pi. xxiv, figs. 3-5). The chief feature of the species is an obscure cancellate ornament formed by transverse and longitudinal folds.

When in 1897 Sir Archibald Geikie published his important monograph on the Ancient Volcanoes of Great Britain he devoted chapter xl to a description of Iceland—so largely does our North Atlantic neighbour bulk in the eves of British vulcanologists. Geikie drew the greater part of his informatiom from Thoroddsen's writings, supplemented by those of Helland, Tempest Anderson, and Johnston-Lavis. His theme throughout was the conspicuous and abundant evidence afforded of fissure eruptions.

“The Present Condition of the Volcanoes of Southern Italy,” by H. S. Washington and A. L. Day. Bull. Geol. Soc. America, vol. xxvi, pp. 375–88, 1915.

A study of the conditions prevailing at Vesuvius, Etna, and theJEolian Islands in the summer of 1914.