254 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 19, 



marked with a red line all those places where the sinkings have hit 

 the Coal or the " coal-measures" ; with a green line those where 

 the Mountain Limestone is reached, and with a blue line those where 

 the sinkings are in the Silurian formation. We have indicated the 

 extent of the several concessions, and have marked, by two red lines, 

 the limits, as they are at present approximatively known, of the coal- 

 basin of the " Pas de Calais." Lastly, we give you separately the 

 number of the sinkings which we know have been made by various 

 companies in the course of the last few years. 



Paris, December 26th, 1855. 



Note. — Several errors in the names of places occur in Plate V. MM. Degousee 

 and Ch. Laurent, having seen a copy of the lithographed Map, which was pre- 

 pared from the tracing forwarded to Mr. Tylor, have kindly transmitted another 

 sketch-map (containing several new features of interest), with the local names 

 very distinctly written. The following is a list of the more important errata : — 



For Marquises 



read Marguise. 



For Harnes read Hasnes. 



— Hardinghem 



— Hardinghen. 



— SoUan — Sallau. 



— Nottinghen 



— Lottinghen. 



— Baches — Raches. 



— Fouquenottes 



— Foucquexolle. 



— Eupin — Erchin. 



— Vizernes 



— Wizernes. 



— Marchicourt — Emerchicourt. 



— Ellinghem 



— Eblinghem. 



— Menchicourt — Monchecourt. 



— Lapagnoy 



— Lapuignoy. 



— Auiche — Aniche. 



— Gounay 



— Gesnay. 



— Rilloy — Tilloy. 



— Bally-grenay 



— Bully-grenay. 



— Auzin — Anzin. 



— Anhay 



— Annay. 



—Ed. 



3. On the Sandstones and Breccias of the South of Scot- 

 land * of an age subsequent to the Carboniferous Period, 

 By R. Harkness, Esq., F.G.S., Professor of Geology and Mine- 

 ralogy, Queen's College, Cork. 



In a memoir " on the New Red Sandstone of the Southern Portion of 

 the Vale of the Nith," published in vol. vi. of the Quart. Journ. Geol. 

 Soc. (p. 389), I have given in detail the names of the localities where 

 sections of these strata are exposed, also their dip at the several lo- 

 calities, and the connexion which exists between the different depo- 

 sits composing what is termed the " New red sandstone" in this 

 neighbourhood. 



In describing the area occupied by this sandstone, I have been in 

 error in supposing that, in the locality under notice, there is a con- 

 nexion between the sandstone-beds of the Vale of the Nith and those 

 of that portion of the Vale of the Annan in which the Corncockle- 

 muir strata occur. A more perfect examination of the Dumfriesshire 

 sandstones induces me to believe that there are five, if not seven distinct 

 areas occupied by these deposits ; and that the beds which appear in 

 these several districts have an intimate connexion with each other, 

 and are, for the most part, referable to the same geological age. 



* See also Mr. E. W. Binney's paper " On the Permian Character of some of 

 the Red Sandstones and Breccias of the South of Scotland," Quart. Journ. Geol. 

 Soc, No. 46, p. 138.— Ed. 



