470 ON THE TRIA.SSIC STRA.TA OF THE SOUTH-WESTERN COUNTIES. 



Prof. Hughes remarked that, as a rule, strata were thickest near 

 the land, whilst the author in his paper spoke of thickening to the 

 south, and of land to the north. Hence it would appear that most 

 of the material forming these deposits must have come from Prance ; 

 and he thought that Mr. Davidson had identified some of the 

 Budleigh-Salterton Brachiopods with French species. 



Prof. Bonnet said that the case supposed by Mr. Ussher seemed 

 to him the same that occurred in the Staffordshire area, north of the 

 Silurian barrier. He doubted whether Triassic beds were likely to 

 be found under London. 



