LIFE-ZOfNES IN THE BRITIsn OARRONIPEROUS ROCKS. 



311 



Gasteropoda — 



Plenrotomaria sp 



Pileopsis sp 



Loxonema sp. . 



,, rugifcv.a .... 



Naticopsis sp. . 



Euphemns Urei .... 

 Cephalopoda — 



Orthcceras off. Alorrisiiacnim 

 Corals — 



Zaphrentis aff. enniskilleni 



Aulopliylliim aff. Wilnschi, Tlionip- • 



Dibunopliyllum aff. <p . . . 



Cyclopliyllum aff. pachyemlotliccum 

 Crustacea — 



Phillipsia aff. mucronata , . 



Mr. C. M. Cockin has demonstrated the presence of Carboniferous 

 limestone belonging to the Cyathaxonia beds in the northern part of the 

 South Staffordshire coalfield, at a sinking for coal at Fair Oak Colliery, 

 near Rugeley. Apparently the whole carboniferous system below this 

 horizon is wanting at that locality. These results were presented in- fj, 

 paper to the Geological Society last session. 



It may serve a useful purpose to summarise the results arrived at 

 since the Committee commenced work some years ago. 



At first work was chiefiy done on the series of black shales and litoe- 

 stone, to which Mr. J. A. Howe and I gave the name of Pendleside 

 Series. Year by year collecting in various districts has demonstrated 

 our thesis that these beds had a definite fauna which distinguished them 

 from the Yoredale Series of Wensleydale. We have obtained this fauna 

 between two very definite degrees of latitude in the Midlands ; that is, 

 the fauna has never been obtained north of the latitude of Settle, or south 

 of the latitude of Leicester. The fauna is found to characterise beds 

 which succeed the upper Dibunophyllum zones of the Carboniferous Lime- 

 stone as far west as co. Clare and co. Limerick, lioughshinny, co. Dublin, 

 the Isle of Man ; and it also occurs E. at Vist^, Clavier near Dinant, and 

 near Mons, in Belgium. 



Zones can bo distinguished in the series according to the following 

 table :— 



Zone ot (rustrlocerai Zisteri 



Zone of li'ly2)hioeeras hilitif/Uf 



Zone of Olyphloreras spirale . 



Zone of Glyphioceras reticulai iiiii 



. , , { Zone ot I'omlonnnnia Bechcri 

 i yatnaxonia bed.* < - - _ . . y 



\ Zone of Proh'caniteg comjircssiis 



( Lower Coal Measures. 

 ' I^Millstone grit. 



■ ] Glyphioceras diadema. 



. Nomismoceras rotiforme 

 . D.,. 



The whole of the Upper Carboniferous Series, comprising the Pendle- 

 side Series, Millstone Grit, and Coal Measures, might be termed the zone of 

 Pterinopecten papyracens. This fossil appears in the loAvest beds, with 

 Posidonomya Becheri, and marks the faunal change. 



I have also shown that the Pendleside Series is represented at Bishopton 



