PERMIAN BEDS OF SOUTH LANCASHIRE. 37 



the way past Medlock Vale to Waterhouses. Since the 

 date of my former papers^ at a point abont a quarter of 

 a mile to the south-west of All Saints^ Church_, marked A 

 in the woodcut^ a very interesting section has been met 

 with in making a bore for water at the extensive sngar- 

 works of Messrs. Fryer and Co. This bore^ which is near 

 2 feet in diameter, was made by Messrs. Mather and 

 Piatt of the Salford Iron Works, with their improved ap- 

 paratus, and as communicated to me by those gentlemen, 



is as follows : — 



ft. 

 Well in red sandstone (trias) 70 



Bore in the same rock 40 



E-ed and variegated marls, with thin bands of limestone. . . 220 



Coarse gravel and pebbles 43 



Compact rock of red and white sandstone 20 



Red and purple marls, containing bands of limestone 126 



519 



The beds of limestone in the red marls afforded beau- 

 tiful specimens of Schizodus obscurus and Bakevellia 

 antiqua, Pleurophorus costatus, Turbo, and Rissoa ; and 

 the whole thickness of these permian marls was much 

 greater than they had been previously met with near 

 Manchester, except at Medlock Vale hereinbefore de- 

 scribed, — their average having been generally about 130 

 instead of 220 feet, as in this section, and 245 feet at Med- 

 lock Vale. The lower red sandstone, on the other hand, 

 was much - thinner than when seen at Collyhurst or at 

 Medlock Vale, hereinbefore described ; and no pebble-beds 

 containing fossil plants Hke those at Astley were found. 

 But the most interesting features in the section are the 

 red and purple marls, containing bands of what were called 

 ironstones when first brought to me. On examination of 

 these specimens, which turned out to be limestones, my 

 attention was arrested by the occurrence of Spirorbis (Mi- 

 croconchus) carbonmmis, and scales of a fish of the genus 

 PalceoniscuSj which, with their physical characters, clearly 



