lS4i 



ON SOME TBAILS AND HOLES FOUND IN BOOKS 



" Upon one slab, I have without much difficulty deciphered 

 nearly forty continuous impressions of the same track. The 

 stride appears to be somewhat more than an inch, and behind 

 the marks are frequently short furrows similar to those already 

 described, where the feet have been di'awn along the surface. 

 No marl or clat/ is found in connexion with the stratum, the 

 preserving agent in this instance being the interposed mica- 

 ceous scales." 



I have examined the quarry at Fullwood, above alluded to 

 by Mr. Lee, and found specimens similar to those hereinafter 

 described as occurring at Scout Mill in the lower flags. The 

 Scout Mill and Fullwood Head quarries occupy the same 

 geological position, and I have therefore little doubt but that 

 the impressions on the surfaces of both flags have been made 

 by the same kind of animal. 



Having made these introductory remarks, it may be as well 

 to give a section shewing the geological position of the several 

 strata wherein the fossils occur. This section will be confined 

 to the limestone shale and the lower division of the Lancashire 

 coal field. A part of it has appeared in a paper by me, printed 

 in the first volume of the Transactions of the Manchester 

 Geological Society.* 



SECTION OF THE LOWER DIVISION OP THE LANCASHIRE 

 COAL FIELD. 



This coal is the last thick 

 seam, and identical with the 

 Lower Woodley Mine of 

 Dukinfield, the Riley Mine 

 of Oldham, the Ariey Mine 

 at Wigan, the Daubhill Mine 

 near Bolton, and the Yew- 

 Tree Mine of St. Helens. In 

 I, Harwood it is very thin. 



* In preparing this section, I have been much assisted by Mr. John Hall, of 

 Nangreaves, and his brother, Mr. William Hall. The thicknesses of the different 

 strata are only approximate, and were taken chiefly near Bury and in Rossendale. 

 Many of the thin coal floors, all containing stigmaria, are omitted. 



yds. ft. in. 

 Coalf Lees, or Dogshaw Mine (the 



black Shale Coal of Sheffield.) ... 1 2 



