BRITISH ISLES. 39 



Spotted schist (formerly called hornblende-schist) ; mica appears, be- 

 comes more abundant, and the rock changes into mica schist. The 

 junction of this with the granite is generally sharp, and the schist 

 near the junction is often much contorted. Analyses (by J. Hughes) 

 show that the metamorphosed slate contains less silica and more 

 alumina than the unaltered rock ; the granite contains more silica and 

 less alumina than the Skiddaw Slates, but it resembles this more than 

 it does the metamorphosed rock. Concludes that the granite is not 

 due to the metamorphism of rocks such as occur in its neighbourhood, 

 but may perhaps be due to metamorphism of underlying parts of the 

 same series. 



Part IV. On the Quartz-Felsite, Syenitic, and associated Metamorphic 

 Rocks of the LaTce- District, pp. 11-27. Refers chiefly to St. John's 

 Vale, Buttermere, and Ennerdale, Carrock Fell, Milton HiU, and Mosedale 

 Crags. The rocks, which lie for the most part at the junction of the 

 Volcanic and Skiddaw series, probably represent the transition beds 

 between the two, in great measure metamorphosed in place. Chemical 

 and microscopic examination show the possibility of these rocks being 

 thus formed. The metamorphism took place at great depths; and the 

 rocks may have been much silicated from below. The resulting magma 

 probably became occasionally intrusive among and absorptive of higher 

 beds. 



Part V. General Summary (of this paper, and of that noticed in the 

 Geological Eecord for 1875, p. 42). Reviews the results under the 

 following heads : — Granite at various depths ; How far granite may be 

 an ultimate product of metamorphism ; Distribution of metamorphism 

 (selective metamorphism); Classes of metamorphism. In Appendices 

 to Parts iii. and iv. there are notices of previous papers on the subject. 



W. T. 



Ward, J. C. Sketch of the Geological History of the Lake District. 

 Trans. Cumb. Assoc, part i. pp. 59-64, diagram map and section. 



The Skiddaw Slates, Volcanic Series, Coniston Limestone, U. Silurian, 

 and Devonian rocks are described, and the course of events in those 

 periods traced. W. H. D. 



Ward, Dr. Ogier. On the Sinking of the South Coast of England. 



Papers Easthourne Nat. Hist. Soc. 

 Gives evidence of subsidence and denudation on the coasts of Sussex 

 and Hants, and in the Channel Islands. 



. On the Bones of Man and Animals found at Eastbourne. 



Pajyers Easthourne Nat. Hist. Soc. 

 Describes a series (of Chalk-rubble, peat, clay, gravel, and allu- 

 vium) containing bones of more than 20 species of Mammals, tabulated 

 for each bed separately. W. H. D, 



Willett, Henry. Third Report of the Sub-Wealden Exploration 

 Committee. Hep. Brit. Assoc, for 1875, pp. 346-;j49. 



