330 



THE NATURALIST. 



To the Editors of the Naturalist. 



Gentlemen. — As a member of the Oswestry and Welslipool Naturalists' 

 Field Club, I thank you for the kind notice of our " Report of Proceedings" 

 which appeared in your number of the 15th February, and also for the 

 special notice you took of my short paper on the Eossiliferous character of 

 the Millstone Grit in this neighbourhood. 



I do not wonder at your hesitation in accepting these beds as belonging 

 to that Formation, but I can assure you, that I have not made any stratigra- 

 phical mistake respecting them, nor can they be assigned to the imj)ure sandy 

 limestone mentioned in my paper on the mountain limestone ; for both at 

 Sweeney and at other places I have traced detailed sections from the base of 

 the Mountain Limestone to the Coal measures, the general order being thus : 



Mountain Limestone. Millstone Girt. Coal Measures. 



The fossils are found throughout the whole series of Millstone Grit beds, 

 not uniformly distributed, but occurring plentifully in places. The fauna is 

 decidedly carboniferous, and, as might be expected, occupies an intermediate 

 place between the Carboniferous Limestone and the Coal Measures. One 

 Brachiopod, Productus semireticulatus which first appears at the base of the 

 Carboniferous Limestone is continued throughout the whole range of the 

 Millstone Grit beds, and in their upper portion is associated with stems of 

 Calamites. 



I am, Gentlemen, 



Your's truly, 



r>. C. DAYIES. 



Coney green House, Oswestry, March 2nd, 1866. 



