V 



PREFACE. V 



between the Rev. W. D. Con^'beare and Mr. Weaver, 

 that the conglomerate usually termed new red con- 

 glomerate, in the neighbourhood of Exeter and Teign- 

 moutb, seems closely to resemble the rothe todte lie- 

 gende, as has been already stated by Prof. Buckland; 

 the magnesian limestone is unfortunately wanting in 

 that country, or at least has not been described, 

 though traces of it are mentioned by Mr. Conybeare 

 (Outlines of the Geology of England and Wales,p. 308) 

 at Sampford Peverell in Devonshire, for beneath that 

 rock the German rothe todte liegende is always des- 

 cribed as occurring. 



In addition to the Synoptical Table above men- 

 tioned, will be found a translation of M. Brongniart's 

 table of the Classification of the Mixed Rocks, in- 

 serted in the Journal des Mines, which will be found 

 useful, by shewing the composition of rocks, bearing 

 names not in common use amongst English geolo- 

 gists. 



Some of the Memoirs will be found shortened in 

 the following translations, but it is hoped that nothing- 

 material has been omitted. 



H. T. De ja Beche. 



