I Have much pleasure in calling attention to an unusually large Gasteropod, which I had the good fortune to find last February near Copt Point, Folkestone, when in company with Mr. Griffiths, the well-known collector.

The deep placers of California are often covered by a thick capping of lava; in other places, the eruptive matter overlying the auriferous gravels occurs in the form of columnar basalt, beneath which is found the auriferous strata of sand, clay, and gravel. These deposits often contain immense numbers of large tree-trunks, which, with those portions of their branches which remain, are either silicified, or are converted into a lignite, often containing a considerable amount of iron pyrites.

In compiling for the Census Bureau of the United States a small geological map, I had occasion to determine the precise areas occupied by workable beds of Carboniferous Coal. As the sum total is different from that recently stated in the GeologicalMagazine, I have thought a correction desirable; and present a few statements, based upon original authorities, the best within my reach.

In the December Number of the GeologicalMagazine there is an abstract of a most interesting paper published in the “Jahrbuch für Mineralogie”, etc., of Leonhard and Geinitz, by C. W. C. Fuchs, entitled, “The Geological, Microscopical, and Chemical Examination of the old Sedimentary Formations in the French Pyrenees, with especial reference to the Metamorphosis of these and other old Rocks”. In this paper attention is called to the manner in which the degree of metamorphism of clay-schists and other rocks is sometimes indicated by the formation and gradual development of certain minerals, Andalusite and Chiastolite being those specially mentioned.

In the fourth part of my Monograph on the Merostomata, published in last year’s volume of the Palæontographical Society’s annual issue, I drew attention to two very singular fossil remains which had been somewhat doubtfully referred by Mr. J. W. Salter to the genus Eurypterus. A portion, at least, of the remains referred by him to Eurypterus? mammatus are really plant-remains (as shown by Mr. Carruthers, op. cit., p. 168), whilst the remainder must, for the present, be classed with M. Jordan’s Arthropleura armatu, from the Coal-measures of Saarbruck, Rhenish Prussia, a very anomalous Crustacean (if it be a Crustacean at all, which I greatly doubt), but which is certainly not a Eurypterus.

The new species of Fossil Tubicolar Annelides, from the Lower Silurian strata of America, figured and described by Prof. H. A. Nicholson in the October and February Numbers of the GeologicalMagazine, has tended to throw light upon a closely allied form found in the Carboniferous Limestone strata of the West of Scotland. This species, as far as I am aware, has not hitherto been figured or described.

Con. and Phil, in 1822 divided into “with flints,” “with few flints,” “without flints,” and recognized the underlying “Grey Chalk,” which they state might more properly be designated “Chalk Marie.”