34 ON THE DISCOVERY OE SILURIAN BEDS IN TEESDALE. 



bourhood of the Pencil-mill ; they have not been found in the Tees 

 above Widdy Bank. 



Besides these boulders, there are others which, closely resemble 

 the impurer bands in the Coniston-limestone series; but nothing 

 can be said positively about these. 



Note. — Since the above was written, beds belonging to the volcanic 

 series of the Lake country have been found in place on the Yorkshire 

 side of the Tees, opposite Widdybank Farm. Their presence in the 

 dale had been previously inferred from boulders. 



