200 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jail. 7, 



appeared in the January Num- 

 ber for 1857 of the Proceed- 

 ings of the Dubhn Geological 

 Society. 



The section here given has 

 numbers corresponding to the 

 beds enumerated in the former 

 paper ; and the overlying Silu- 

 rian strata (10, 11, 12) are in- 

 troduced to shovsr their relations 

 to the highly inclined Cam- 

 brian beds under notice. 



No. 1 . The dark-olive shales 

 have not yielded any trace of 

 fossils ; but in one place the 

 harder beds of the same series, 

 which are designated No. 2, 

 have traces of the Arenicolites 

 didymus. 



No. 3. The same fossil {A. 

 didymus) v^as found in the 

 lower part of the Oakham 

 Dingle, considerably below the 

 beds in the Carding-mill Brook, 

 from whence it was figured be- 

 fore. Of their existence at this 

 place there can be no doubt. 



The higher parts of No. 3 

 were carefully searched by my- 

 self and an assistant (Mr. John 

 W. Rhind), and yielded an 

 unexpected Sundance of the 

 worm-burrows, both large and 

 small. The best localities ap- 

 pear to be at the head of Oak- 

 ham Dingle, where the brook * 

 flows N.E.-S.W. on the strike 

 of the beds, and also along the 

 same line in the next valley, 

 viz. on the west side of Year- 

 ling Hill, on the brook that 

 flows down to the "Ashes." 

 The latter locality was very 

 prolific, and nearly all our best 



* This brook (of clear sparkling 

 water, like all the " gutters " of the 

 Longmynd) is intended to yield a 

 water-supply to the town of Church 

 Stretton, 



5^ -H © Oioo t^ 



