BRITlSn ISLES. 3S' 



recorded from all the localities occur. . Most of the shells were more or 

 less fragmentary ; but a perfect Leda pernula occurred at Edge Hill, 

 and a Tellina Balthica, with the colouring-matter retained, at Broad 

 Green. The author believes that tidal currents, acting on the various 

 portions of the sea-bed during the subsidence and re-elevation to the 

 extent of 2000 feet, distributed the Drift deposits with their included 

 shells, and caused the lines of bedding observable. Astarte horedlis 

 and 11 other northern shells occur, as well as 21 that range as far south 

 as the Lusitanian and Mediterranean provinces. Before the low-level 

 marine beds were deposited an ice-sheet passed over the country. 



C. E. DeK. 



Richardson-, Ralph. A Tale of Ages, being a poetical description 

 of some of the Geological and Historical Changes which have 

 occurred in the neighbourhood of Edinburgh. 8vo. Edin. 



RiCKETTS, Dr. C. The Metamorphic Rocks of the Malvern Range, 

 and the Strata derived from them. Proc. Liverpool Geol. Soc, 

 Session 15, pp. 72-79. 



Refers to evidence of stratification in these rocks, and to the proba- 

 bility of the present contour of the hills being due to successive periods 

 of subaerial denudation. Fragments of rounded quartz, felspar, &c. 

 occur in the conglomerate at the base of the Hollybush Sandstone 

 (Upper Cambrian of Dr. Holl), in the Upper Llandovery (Wenlock 

 Conglomerate of Sedgwick). 



Mentions a conglomerate discovered by the sister of the late Pro- 

 fessor Phillips on the western side of the Worcestershire Beacon, full 

 of Upper Silurian fossils. States that after the deposition of the Old 

 Red, and probably of the Carboniferous rocks, the strata were con- 

 torted, folded, and placed on end, and then denuded, the Haffield con- 

 glomerate, porphyry, granite, tfec. of Phillips (Permian of the Survey 

 Maps) lying on the upturned edges. C. E. De K. 



. Is the Mersey filling up ? Liverpool Daily Courier, May 15th 



(reprinted). 



Discusses the geological history of the Estuary of the Mersey. The 

 rock-basin above Rock Ferry was excavated by glaciers ; afterwards 

 the land stood at a higher level than at present, and trees grew which 

 are now submerged ; this submergence has formed the estuary. To 

 preserve the water-channels at the entrance it is essential that the 

 water-space, especially in the upper portion, be not lessened, so that 

 the scour may not be lessened — also that the rivers continue to bring 

 down their present quantity of water, and that no obstruction bo offered 

 to their flow at ebb-tides. The Lune is instanced as an example where 

 these conditions were not regarded, and where the navigation is con- 

 sequently impeded. W. T. 



Roberts, Capt. John. On the Deposition of Minerals in the Pass of 

 Drws-y-Coed. Rep. Miners' Assoc. Cornwall and Devon for 

 1873, pp. 41-43. 



The copper-ore in the lodes occurs in connexion with slides, which 

 1874. D 



