36 GE0L0<3Y. 



Roper, F. C. S. Flora of Eastbourne. 8vo. Londm. 



Geological Map of the Cuckmere District [reduced from the Geolo- 

 gical Survey Map]. Geology, pp. xi, xii. Marsh Land, pp. xiv, xv. 

 Distribution of plants in relation to geological formations, tfec. pp. xxx- 

 xxxiii. W. W. 



Notes on the Flora of Eastbourne, as compared with that of 



"West Kent and West Surrey. Papers Eastbourne Nat. Eist. Soc. 

 Thinks " that the variations in the flora arose more from the contour 

 of the country and geological structure than from geographical posi- 

 tion." W. W. 



Russell, R. On the Permian Breccias of the Country near White- 

 haven. Hep. Brit, yissoc. for 1874, Sections, pp. 92, 93. 



Describes breccia near Bigrigg Moor and Rowrah. It is generally 

 composed chiefly of angular and subangular fragments of Carboniferous 

 Limestone, but other rocks are often present to a large extent; the 

 fragments are embedded in a calcareous and sandy matrix, cemented 

 by peroxide of iron. It lies unconformably on various formations, 

 from Coal Measures to L. Silurian, but it underlies the Permian sand- 

 stones. Concludes, from its composition and distinct bedding, that this 

 deposit is due to ice-action in Permian times, not, however, to glaciers 

 or icebergs. Suggests that fragments of rock have fallen on the ice- 

 foot, and have been carried away and dropped in the deeper and quieter 

 sea-bottom. W. T. 



The Geology of the North Yorkshire Coalfield. C'oU. Guard. 



vol. XXX. pp. 563, 564. 

 Head at Meeting of N. of England and Midland Engineers. [Really 

 the same as the paper noticed in Geological Recoed for 1874, p. 34, 

 under a diff'erent title.] 



Sainter, J. D. The Geology of Mow Cop, Congleton Edge, and the 



surrounding District. iV. Staf. Field Club Papers, pp. 140-146. 

 A general account of the geology of the district crossed in an ex- 

 cursion, 



Simmons, W. The Metallic Ores of Cornwall. — Group 1. Tin, 



Copper, Iron, and Lead. Proc. Liverpool Geol. Soc. vol. iii. part 1, 



pp. 28-35. 



The chief tin yield is from an area occupying a circle with a radius 



of 1-J miles. The average produce of the stuff raised is less than 5 per 



cent. No less than 30 copper- ores occur in the granite, clay-slate or 



killas, and in the serpentine. The lead- ores are few, the chief source 



of supply being galena, which occurs in veins associated with tin, 



copper, and iron, and by itself. The amount of silver averages 40 oz. 



to the ton, while the average of British mines is only 10 oz. The 



iron lodes have recently been largely developed; that of Perran is 



100 feet in width, consisting of brown oxide, passing in depth into 



chalybite, below which the lode contains blende, galena, and Towanite. 



