96 MR. L. M. PARSONS ON THE CARBONIFEROUS [vol. Ixxill,. 



' Humerosus ' Beds. 



r Syringopora sp. r. 



— f9\ j Pugnax prigmis {MsiTtin). r. 



— w- *| Pi-oductus Inimerosus Sowerby. c. 



y_Productus sp. r. 



Lower Beds on the eastern side of the hill. 



Syringopora cf. reticutafa Goldfuss, r. 



Syringopora sp. r. 



Michelinia ? r. 

 = (1). <{ LitJtontrotion irregulare (Phillips), r. ' 



I Cyatliophyllinn att". mv.rcliisoni Edwards & Haime. c. 

 I Indeterminate corals, apparently of Cyathophyllid & 

 1^ KoninckophyUid types. 



Beaumonfia egerfoni, Sj)irifer jylanicosfa, and Producfus 

 antiquatiis obtained from the Avesteni side of the hill, indicate 

 that these beds (4) are correctly referred to the D.^ sub- zone, 

 while tlie presence of Zai^hrentis suggests that the horizon is the 

 same as that of the fossiliferous beds of Ticknall. These stmta 

 consisted originally of highly encrinital material, and I conclude 

 that they are the eastern extension of the crinoidal limestones seen 

 in the Avestern inliers. The dolomites with chert (3) are mostly 

 hidden, as the quarries do not extend far enough westwards to 

 break into them. Hence a thorough examination is impossible ; but 

 there is no reason to doubt that they are the same as the dolomites 

 with chert seen at Breedon Cloud, where an undoubted D., fauna 

 is obtained from them. 



The yellow dolomites (2) with Prodiictus humerosus yield that 

 species in fair numbers, and it is supposed that these beds are the 

 local equivalent of the Caldon-Low facies occurring near Water- 

 houses in the south-western part of the Midland area.i As at 

 Caldon Low, ^yringo'pora is the only coral found in these beds ; 

 but, on the other hand, Piignax pugniis, a brachiopod that is not 

 mentioned as being found in the Caldon-Low beds, occurs sparingly 

 at Breedon, and Daviesiella aff. comoides does not appear to be 

 associated with Product us humerosus. Prof. Sibly refers the 

 Caldon-Low beds to the D^ sub-zone, and the equivalent beds at 

 Breedon-on-the-Hill are also referable to the same sub-zone, for 

 they underlie a considerable thickness of cherty dolomites which 

 are the local representatives of the cherty limestones of the Ti, 

 sub-zone in the Midland area. The Caldon-Low facies has been 

 observed only at the south-western extremity of the Midland area ; 

 and, if we consider the Carboniferous Limestone outcrops noi-th of 

 Ashby as a south-eastward extension of that area, it is interesting 

 to note that the same specialized P rod uctus-hu merosus beds occur 

 also at the extreme south-eastern corner of the Province. 



The dolomites (1) below the ' humerosits^ beds, and forming the 

 eastern side of the hill, are rather thickly-bedded and almost barren. 

 AVhere the rock is not being worked it weathers with a grey outer 



1 T. F. Sibly, Q. J. G. S. vol. Ixiv (1908) p. 44. 



