Having read with great interest Mr. E. E. L. Dixon's remarks on the Radiolarian cherts of Gower in the November number of the Quarterly Journal of the Geological Society, I am tempted to offer some notes on the occurrence of similar rocks in the Malay Peninsula and Archipelago, where Radiolaria-bearing rocks are known to be widespread.

The writer's attention was directed to Dr. Omori's description of the 1910 eruption of Usu-san through a review which appeared in Nature (1911, p. 221) from the pen of Professor Milne, F.R.S. The following pages constitute a résumé, rather than an additional review, and are justified on account of the interest of Omori's observations to many geologists who may not find it convenient to consult his original paper. All three figures here published have been redrawn for the purpose. Plate XII is based on a coloured map, and Plate XIII on photographs which have already been reproduced by Professor Milne in his review.

In the recent memoir on the Geology of the Country around Ollerton a description is given of certain ‘Green Beds’ which in that neighbourhood form the base of the Keuper Waterstones and overlie the Bunter Pebble Beds.

During a visit to Costa llica in the year 1910 I was able to spend about ten days in the comparatively little-known peninsula of Nicoya. The trend of the peninsula is north-west to south-east, and it is separated from the mainland by the Gulf of Nicoya, a shallow arm of the Pacific Ocean, which opens to the sea on the south-east.

With a view to showing that distortion under stress may take place in ice when several degrees below the freezing-point, Dr. Main made a number of experiments at St. Moritz in the Engadine during the winter of 1887. Although, as Main says, “The experiments are to be regarded rather as proving the existence of continuous extension under tensile stress than as determining its amount,” the records of his tests are sufficiently detailed to admit of the viscosity being calculated.