28 GEOLOGY. 



Murchison, J. H. British Lead Mines. With Maps of the Durham, 

 Northumberland, Shropshire, Cardiganshire, and Montgomery- 

 shire Lead Mining Districts. Pp. 30 ; 3 maps. 8vo. London. 



Nicholson, Prof. H. A., and Charles Lapworth. On the Central 

 Group of the Silurian Series of the North of England. Rep. 

 Brit. Assoc, for 1875, Sections, pp. 78, 79. 



The rocks are grouped as follows in ascending order : — A. Coniston 

 Limestone Series — Dufton Shales, Coniston Limestone, Trinucleus 

 Shales ; B. Coniston Mudstone Series — Skelgill Beds, Knock Beds. 

 The Coniston Mudstone Series is Middle Silurian, the equivalent of 

 the L. and U. Llandovery and Tarannon Shales. This series is distinct 

 from the Coniston Flags, which form the true base of the U. Silurian, 

 the equivalents of the Denbighshire Flags, and of the Balmae and 

 Eiccarton Beds of S. Scotland. W. T. 



Norton, H. A Report of three visits to Pakefield and Kessingland 

 . . . . , 1875. Supplement to the Norfolk Chronicle, May 6. 



Describes the lithological characters and variations in the beds along 

 the base of the cliffs beneath the Middle Glacial sands. Mentions a 

 local deposit of black laminated micaceous clay, and remarks that it 

 could not be continuous with the Chillesford Beds as described by 

 Mr. Gunn. Saw no stumps of trees that had grown in situ, and ques- 

 tions the use of the term " Forest Bed." H, B. W. 



Parry, Samuel. Human Remains beneath Boulder Clay ? Geol. 

 Mag. dec. ii. vol. iii. p. 528. 



Records the discovery of human bones in slaty clay at Rhyl (N. 

 Wales). This clay, with an associated bed of peat, is thought to pass 

 inland under Boulder Clay. Section given. W. H. D. 



Parsons, Dr. H. F. The Maritime Plants and Tidal Rivers of the 



West Riding. Naturalist, ser. 2, vol. i. pp. 113-120. 

 Analysis, by E. Hunter, of the Warp of the Humber ; and list of 

 Diatoms found therein, pp. 119, 120. 



Pengelly, W. Eleventh Report of the Committee for Exploring 

 Kent's Cavern, Devonshire. Bep. Brit. Assoc, for 1875, pp. 1-13. 



ClinnicTc's Gallery. — The cave-earth is sometimes absent, the two 

 stalagmites coming together. The older or crystalline stalagmite was 

 broken and disturbed before the deposition of the newer or granular 

 stalagmite. The breccia yielded remains of the lion and bear, and 

 some flint implements. Cave of Inscriptions. — The inscriptions are 

 mentioned, the earliest being dated 1609 ; a thin layer of cave-earth 

 extends throughout, which occasionally comes in contact with the 

 breccia ; the older stalagmite is broken, as already mentioned. The 

 remains found here are described, and also the work done in the Recess., 

 the Alcove, and the Great Oven. Throughout the cavern the cave- 

 earth always contains remains of hyaena ; near the entrances remains 



