Vol. 67.] FAUNAE HORIZONS IN THE BRISTOL COALFIELD. 321 



Naiadites dongata (?), all in a compact black shale. It is ex- 

 tremely likely that this shale came from the vicinity of the Little 

 Toad Seam. Dr. Wheelton Hind has recorded the occurrence at 

 this colliery of Anthracomya phillipsi, but the horizon was not 

 determined. 



Upper Coal-Measures of the Northern Portion of the Coalfield. 



Examination of the spoil-heaps of collieries in which the Upper 

 Series are worked has proved that several faunal horizons occur 

 in the Upper Coal-Measures of the northern portion of the coalfield. 



(5) Coalpit- Heath Colliery. 



This colliery lies in the northern basin of the coalfield, being 

 shut off from the larger Bristol portion by the Kings wood Anti- 

 cline, which brings up the Pennant Grit and Lower Coal-Measures 

 to the surface. The colliery is about equally distant from Man- 

 gotsfield on the south, and from Iron Acton on the north. Only 

 four workable seams are present in the Upper Measures in this 

 district, the lowest being the High Vein, which is reached at a 

 depth of 62-1 feet in the shaft of Coalpit-Heath Colliery. The 

 lower 152 feet of the shaft gave the following section : — 



Feet inches. 

 f Hard Vein 2 3 



Parkfield J S^Vl & o 2 



Series ^ Holly Bush 2 (> 



feeiie3 ' I Strata 58 



^ High Vein 5 



The roof-shales of the High Vein yielded the following series of 

 fossils : — Anthracomya williamsoni, Naiadites elongata, Leaia leidyi 

 var. salteriana, Bairdia cf. ampla, Bairdia sp., and Estheria sp. 



Lower Coal-Measures of the Vobster Area. 



Two collieries opened in the ' Vobster and New Rock Series y 

 yielded fossils, namely those of Newbury and Mackintosh. The 

 Mackintosh pit, which is frequently spoken of by the miners as 

 the ' Highbury,' lies to the south of Radstock, and is deeper than 

 that of Newbury, two seams of the Vobster Series being worked at 

 depths of 1242 and 1620 feet respectively. A dark compact shale 

 from this colliery yielded ostracoda and a fragmentary valve of 

 Anthracomya (?). 



(6) Newbury and Mackintosh Collieries. 



The Newbury Colliery lies in the Coleford district, a few miles 

 south of Radstock. The shaft goes down to a depth of about 

 720 feet, and near the bottom passes through the upper member 

 (the Dungy Drift) of the Vobster Series. From the base of the 

 shaft, a northern branch has been carried below and beyond the 



