part 2] LIMESTONE OF THK LKICESTERSUTRE COAf^FIKI.D. lol 



Spirifci' (»f doubtful species. Some time aj^o Prof. E. J. Garwood 

 found a species of P/U)Jtfrfux, whieh lie informe<l me was 

 sutficieut to fix the horizon as being fairly high u]) in the iJihujio- 

 phyUiim Zone, but unfortunately the specimen has been mislaid. 

 It has been considered that the l>eds at Grace Dieu represent a 

 higher horizon than that of any part of Breedon Cloud ; but this 

 cannot l»e the case, since the beds at the latter place range from 

 the top of the * humerosus'' facies in Dj to the 'Pendleside' Shales. 



V. CuMTAinsON OF THE CaIMJOMFERcjUS LiMESTONK OF THE 



Area with that of the Main District (Derrvshire 

 AND North Staffordsuire) of the Midland Province. 



A i>erusiil of the lists of fossils tiibulated in this paper, and those 

 given in Prof. T. F. Sibly's paper on ' The Faunal Succession in 

 the Carboniferous Limestone of the Midland Area,' ^ will show 

 tliat, as one might expect, the Carboniferous Limestone north of 

 the Leicestershire CoalHeld is an eastern extension of the Midland 

 Province. In other words, the faunal sequence exhibited in the 

 inliers described above is essentially Midland in type. 



A comparison of the Midland faunal succession with that of other 

 Provinces is given in Prof. Sibly's ])aper and need not be re- 

 peated here. I pro})ose only to comment on the relation of the 

 Leicestershire area to that investig-ated by Pmf. Sibly. In 

 neither area is the base of the limestone seen. 



1. L)|, the sub-z )iie of l)ihKnoi)Jnilhim 0. 



The ui)per limit of the sub-zone occurs a little above the Upix-r 

 T()adstone in Derbyshire, but is indistinct in Leicestei-shire. The 

 development in the south-western part of the main area of an 

 abnormal facies known as the *Caldon-Low Facies," finds its 

 parallel at Breedon and Breedon Cloud, and I consider this pctrtion 

 to bf the highest i)artof D, definitely recognizable in the Leicester- 

 shire art'a. Its similarity to the corresponding beds at CaMon 

 Low has alrejidy been noted in the description of the Kasti-rn 

 inliers. The remaining jxirtion of the sub-zone below the Pro- 

 duct ua-hunieroxioi beds must represent a cori*esjMinding thickness 

 of the same sub-zone in Derbyshire. The fact that simple Dibuno- 

 phyllids have not been f»»und at Breedon can hardly be considei-ed 

 of value, as dolomitization has rendered it very difhcult to identify 

 such corals as do occur. Kven the Derbyshire normal limest<mes 

 are ])oorly fossiliferous, and Dihiinoithtflhnn occurs there but rarely 

 in the lower portions of D,. The typical form of Pr<uhictu» 

 gif/antrua does not occur in this sub-zone in either distinct, but 

 Prndurtiix afT. fjiqiinirifs docs occur. 



* Q. J. (i. S. vol. Ixiv (ll»os) pp. 42 ei sfqtj. 



