386 NATURAL SCIENCE. Nov.. 



shows an excellent record of work done, and due credit is given to 

 the admirable weather which permitted a survey of 200 square miles 

 in excess of that surveyed in the previous year. 



Nine new sheets of the one-inch map of England and Wales 

 were issued during the year in two editions (Solid and Drift), while 

 forty-nine MS. coloured copies of the six-inch maps have been 

 completed and deposited in the office for public reference. 



In the record of field work we find that Mr, Fox-Strangways 

 has revised the mapping of the Charnwood Forest area, and deter- 

 mined the overlap of the New Red Marl. The contact of the 

 eruptive rocks with the altered strata has also been observed at 

 Badden Wood and Garenden, while much detail has been ascertained 

 of the topography of the land that sank beneath the Keuper Sea. 

 Mr. Lamplugh has been engaged in studying the "Skiddaw Slates" 

 of the Isle of Man, but has as yet not obtained any clear idea of the 

 succession. He has obtained a few obscure organisms from the 

 slates, but nothing of any palaeontological value. The red sandstones 

 to the north of Peel have, however, yielded more tangible evidence, 

 and the corals found, though specifically indeterminable, seem to point 

 to Upper Silurian or Devonian age. 



In the Devonian area, the presence of Entomides near Tor Point 

 establishes the presence of Upper Devonian rocks to the west of 

 Plymouth Sound, while the Plymouth district has been brought into 

 connection with those of Newton Abbott and Torquay. 



Messrs. Strahan and Gibson have completed sheet 249 of the 

 -one-inch survey of the South Wales Coal-field, and sheets 232 and 263 

 are in progress. By tracing the outcrops of certain coal seams, 

 Mr, Strahan has ascertained approximately what part of the Pennant 

 Rock forms the surface of the ground of the anticlinal ridge which 

 separates the Caerphilly and Llancaiach basins, information of 

 considerable commercial importance. 



The Permian and Trias areas are mainly under the observa- 

 tion of Mr. De Ranee, who, among other matters, has made a detailed 

 examination of the sections exposed in cutting the Manchester Ship 

 Canal. 



Some few new localities for Corallian fossils in the great Oxford 

 Clay series of Huntingdonshire and Bedfordshire have been found by 

 Mr. Cameron ; while Mr. H. B. Woodward and Mr. Strahan 

 have examined and photographed the Jurassic beds exposed in the 

 Dorsetshire cliffs between Swanage and Weymouth for the purpose 

 of preparing a detailed section. 



The subdivisions of the Chalk have been studied by Messrs. 

 Hawkins and Jukes-Browne, and much interesting information has 

 been obtained on these points. The Chalk Rock of Dorset varies 

 much lithologically, and at Winterbourne Abbas two beds of hard 

 brecciated rock were found to be separated by five or six feet of 

 softer glauconitic chalk containing large grains of quartz. The 

 brecciated material contains small fragments of fine-grained green- 

 sand, which, as Barrois has noted, correspond with varieties of Upper 

 Greensand, indicating possibly that the Upper Greensand was under- 

 going erosion not far from this place during the formation of the 

 Chalk Rock. 



In the Tertiary deposits the true position of the Ramsdell 

 Clay has been cleared up, and Mr. Blake shows that one 

 part belongs to the London Clay and the other to the Bagshots. 

 Mr. Clement Reid continues his work on the Eocene deposits of 



