OF THE CABBONIFEROUS STRATA. 201 



' It is the soul that sees : the outward eyes 

 Present the object, but the mmd descries; 

 And thence delight, disgust, or cool indiflfrence rise.' 



** We may live among the grandest scenes of nature, or may 

 visit the noblest monuments of art, and remain insensible to 

 their beauty or sublimity. Differently affected, we may find 

 in the barren sands of the sea shore enjoyment of the purest 

 character, and speculations which, rising from nothing more 

 important than the trail of a sea slug, will lead us to contem- 

 plate, and in some measure to comprehend, some of the most 

 extensive operations of nature, and bring under review un- 

 numbered ages, past, present, and to come." 



Explanation of the Plates. 



Plate I. fig. 1. Upper surface of a flag of sandstone from 

 Hutton Roof, shewing the trail of a mollusc, (?) drawn on the 

 natural size. 



Fig. 2. Upper surface and side view of a flag of sandstone 

 from the Bury and Liverpool Railway near Upholland, shew- 

 ing the holes of the arenicola carbonarius, drawn on the 

 natural size. 



Plate II. fig. 1. Upper surface of a flag of sandstone from 

 Scout Mill near Stalybridge, shewing the casts and trail of a 

 bivalve shell, drawn on a scale of one-seventh the natural 

 size. 



Fig. 2. Serpula carbonarius, from the upper carboniferous 

 limestone of Ardwick, on a scale of twice the natural size. 



Fig. 3. Spirorhis carbonarius, from the roof of the Four 

 Feet Mine, Bradford, twice the natural size. 



Fig. 4. Spirorbis omphaloides, from the roof of Mr. Stocks' 

 coal at Shaly Brow, twice the natural size. 



2d 



