170 



CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 



General Section of the Derbyshire Coal-field. 

 From Mr. A. H. Stokes' Section. 



ke ' ]• Butterley 

 ke, J J 



Hozels Coal 

 Measure and Balls Rake, 

 Staveley 



Top Hard Coal 



Duusil Coal 



Waterloo Coal 



Cannel Coal 



Tunnel Coal 



Buff or Cement Rake 



Binder Bark Rake 



Brown Rake, 



Black Rak 



Ell Coal 



Deep Soft Coal 



Boor Rake, Alfreton 



Blue Rake, Butterley 



Deep Hard Coal 



Biper Coal 



Whetstone Rake and Wallis 



Rake, Butterley 



Dogtooth Rake 



Ironstone, Staveley 



Tupton Coal 



Nodule Rake, Morley 



Black Shale Rake 



Silkstone, Black Shale, or Clod 



Coal 



Green Close Rake 



Holly Close Rake 



Black or Ketlands Rake 



Bacon Flitch Rake 



Yew Tree Rake 



Kilhurn Coal 



Honeycroft Rake 



Cavilly Rake 



Naughton Coal 



Dale Moor Rake 



Gannister 



/ 



With Carbonicola subconstricta ? * 



With Carbonicola robusia and 

 Naiadites modiolaris. At Coduor 

 Bark. 



These beds contain at several hori- 

 zons one or other of Carbonicola 

 acuta, C. aquilina, C. ovalis, 

 C. nucularis, Naiadites modio- 

 laris, aud N. carinata. 



* In the ' Memoirs of the Geol. Survey of Great Britain,' " The Iron Ores of Great Britain," part i, p. 40, is stated, 

 " Tins shell, Unio or Anthracosia, probably of several species, is found more or less abundantly in all the Ironstone beds, 

 from the top of the section down to the Black Shale Hake. In the lower measures it is much more scarce, or is even 

 altogether wanting in some of the very lowest. The Anthracosia bipennis which occurs in the Measure and Balls Rake is 

 found also in the Low .Moor Ironstone, and at Mold in Flintshire." 



