BRITISH ISLES. 11 



the bed of greensand or firestone upon which Wantage is built. In 

 this bed the author has found nearly 50 species of fossils. A. J. J-B. 



Davies, D. C. The Phosphorite Deposits of North Wales. Quart, 

 Journ. Geol. Soc. vol. xxxi. pp. 357-367. 



At the top of the Bala Limestone is a bed, 10 to 15 inches thick, full 

 of nodular concretions of phosphate of lime. The nodules contain 

 about 64 p. c. of phosphate ; the matrix contains about 46 p. c. Gra- 

 phite occurs in the matrix and around the concretions. The under- 

 lying limestone, usually only 6 inches thick, contains from 15 to 

 20 p. c. of phosphate. Fossils in the overlying shale are phosphatized. 

 These beds have been traced over a large area. The author regards 

 the phosphate bed as an old sea-bottom, in which the phosphate 

 derived from Crustacea and Mollusca accumulated. Analyses are 

 appended. W. T. 



Davies, T. G-. Observations on the Llynfi and Ehondda Mineral 

 District. Proc. S. Wales Inst. Eng. vol. ix. part i. no. 2, pp. 32, 

 33. Discussion (partly also on Mr. Barrow's paper), pp. 33-39, 

 and no. 3, pp. 142-145, pi. 20. Plates 1-3 (map and sections). 

 The paper is explanatory of the sections. One of these is a trans- 

 verse section from the Glyncorrwg fault to Dunraven Colliery, Ehonda 

 Valley. The others are comparative vertical sections at Carnarvon, 

 Maesteg, Ogmore Yalley, Clydach Vale, and Dinas. PI. 20 is a " Plan' 

 showing the course of the Glyncorrwg Fault, from Blaen Corrwg to 

 Afon Yalley," by H. K. Jordan. W. W. 



Davis, J. E. Rambling Thoughts in a Hanley Marl Pit. N, Staff, 



Field Club Papers, pp. 68-79. 

 Descriptive of Coal and its formation. 



. On the Absence of Waterfalls in the Scenery of North Staf- 

 fordshire. N. Staff. Field Club Papers, pp. 146-156. 



Concludes that the reason there are no waterfalls is that " there are 

 no alternating beds of trap or other hard rocks to interfere with the 

 gradual descent of streams." W. W. 



De Ranee, C. E. The Geology of the Country around Blackpool, 

 Poulton, and Fleetwood. (Sheet 91 S.W. of the Geological Survey 

 Map of England and Wales.) 8vo. Lond. Pp. 14. 



The Keuper has only been reached in borings. The district is covered 

 by alluvial and glacial beds, which are described in the following 

 order: — Glacial — Lower Boulder Clay, Middle Sand and Shingle, Upper 

 Boulder Clay ; Pre-historic — Preesall Shingle, Lower Scrobicularia Clay, 

 Lower Cyclas Clay, Peat ; Recent — Marsh Clay and Tidal Alluvium, 

 Upper Scrobicularia Clay, Upper Cyclas Clay, &c.. Blown Sand. In 

 the Appendix is given the percentage of stones in different samples of 

 the Boulder Clay, and a list of heights. W. T. 



. On the Relative Age of some Valleys in the North and South 



of England, and of the various [Glacial] and Post-Glacial Deposits 

 occurring in them. Proc. Oeol. Assoc, vol. iv. no. 4, pp. 221-253, 



