12 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 1 /, 



southward. In the centre it is a dark grey compact hmestone, de- 

 generating into a clayey shale at the outside. 



The fossils which I extracted from it have been submitted to Mr. 

 Salter, who has had the kindness to examine and minutely describe 

 them. For the most part they were ill-preserved, and not numerous ; 

 with the exception of the Orthides, which were very perfect, and at 

 Knockdolian were in tolerable abundance. I hope at another visit to 

 increase the list, and add something to this imperfect sketch. 



Fig. 3. 



Corswall Lighthouse. 

 Dally Bay. 



Cairnbrock, 



Ballantrae. 



Port Patrick 

 Port Spittal 



Ardwell Bay. 



Port Logan 

 Portencorkrie Bay 



^Grennaa. 



Kirkmaiden. 



MuU. 



Explanation of Map. 



Silurian rocks. 

 Fossiliferous beds in ditto. 

 Red conglomerate. 

 Carboniferous sandstones. 



fiv^^x-i^^^sp^'' poi-piiyry, &c. 



-.0: ;iv" j Granite . 



