548 Notices of Memoirs — Geological Survey Memoirs. 

 ITOTIOiES OIF IMIEIMIOIiaS. 



I. — Geological Survey Publications. 



1. The Geology of the Country arounb Mallerstang, with 

 PARTS of Wensleydale, Swaledale, and Arkendale. By 

 J. E. Dakyns, E. H. Tiddeman, E. Eussell, 0. T. Clough, 

 and A. Strahan. (Parts by J. G. Goodchild, C. E. De Eancb, 

 G. Barrow, and F. H. Hatch.) 1891. pp. 213, Price 3s. U. 



THE area described by tlie numerous authors in this Memoir is, 

 for the most part, an elevated tract rising 2000 feet and more 

 above the sea-level, and including the sources of the rivers Ure (or 

 Yore), Swale, Lune, and Eden. The oldest rocks exposed belong 

 to the Coniston Limestone Series, and of this series the Ashgill 

 shales form the upper part, and the top of the Lower Silurian (or 

 Ordovician). The lowest division in the overlying Upper Silurian 

 system is that known as the Stockdale shales, and it is remarked 

 that its base is determined principally on palEeontological considera- 

 tions, for there is an abrupt change from the fauna of the beds 

 below, without any stratigraphical unconformity. Succeeding the 

 Stockdale Shales are the Coniston Flags and Grits, and the Bannis- 

 dale Slates. Eesting unconformably on the Silurian rocks comes 

 the great Carboniferous series, including representatives of the 

 Basement red conglomerate and sandstone (which may be of the 

 age of the Upper Old Eed Sandstone), Lower Limestone Shales, 

 Great Scar Limestone Series, Yoredale Eocks, and Millstone Grit. 

 The description of these rocks occupies the greater part of the 

 Memoir, which indeed deals with the district of Uredale (Yoredale) 

 or "Wensleydale, from which the Yoredale rocks take their name. 

 Some Permian and Triassic rocks, as well as Glacial Drifts and 

 Eecent deposits, are described. There are also notes on the Lead- 

 mining, on the Coal-beds which occur in the Yoredale Series and 

 Millstone Grit, and on the Building-stones. 



Dr. Hatch contributes notes on the Eruptive rocks ; and there is 

 a list of Carboniferous fossils by Mr. Etheridge. 



2. The Geology of Parts of Cambridgeshire and of Suffolk 

 (Ely, Mildenhall, Thetford). By W. Whitaker, H. B. Wood- 

 ward, F. J. Bennett, S. B. J. Skertohly, and A. J. Jukes- 

 Bkowne. 8vo. pp. 127. Price 2s. 



[N this Memoir we have the accounts of the Oxford Clay, 

 Corallian Beds, and Kimeridge Clay of the neighbourhood of 

 Willingham, Upware, and Ely. Mr. T. Eoberts has contributed 

 a revised list of the Upware Fossils (from his, as yet unpublished, 

 Sedgwick Essay of 1885) ; and Mr. E. T. Newton has some notes 

 on the Yertebrata from the Kimeridge Clay, in the collection of 

 Mr. Marshall Fisher of Ely. Then follow notes on the Lower 

 Greensand and its Coprolite BedS; on the Gault, and on the several 



