322 ME. HEEBEET BOLTON ON [Aug. 1 9 I I , 



shaft of the Luckington pit, intersecting the following seams of the 

 New Rock Series : — 



Firestone. 

 Great Course. 

 Strap. 



Grarden Course. 

 Warkey Course. 

 Thin Coal. 

 No. 1 Seam. 

 No. 2 Seam. 

 Thin Coal. 



The upper part of the Newbury shaft passes through two seams 

 of the Yobster Series, which normally lie below the Dungy Drift, 

 but are here uppermost, as all the seams lie reversed. The Dungy 

 Drift Seam lies at an angle of 45°, dipping southwards, while the 

 New Rock Series has only a dip of 35° in the same direction. 



From the spoil-heap at Newbury Colliery I obtained a dark- 

 blue shale containing Lingula mytiloides. In determining the 

 horizon whence this shale came, Mr. J. W. Cottle rendered con- 

 siderable assistance. Fortunately for purposes of localization, but 

 one coal, that known as the No. 1 Seam, has been worked for 

 some time, and therefore it is almost a certainty that the Lingula- 

 Shale found at the pit-surface came from the roof of this seam. 



An incline passes down to the seam from the Luckington shaft, 

 and some evidence of this Linguliferous horizon ought to be ob- 

 tained on the spoil-heap of the latter colliery. Mr. Cottle added 

 that, if these fossils had come from Mackintosh Colliery, which 

 lies to the west of Newbury Colliery, they would have been derived 

 from the black shales normally overlying the Coking Coal or Dungy 

 Drift, but now forming its floor on account of the overturning of 

 the seams. 



From Mackintosh Colliery I obtained, not a Lingula Shale, 

 but a dark compact shale which yielded ostracods and a frag- 

 mentary valve of Anthracomya. One small Estheria-like fossil has 

 a length of 4 millimetres and a depth of 3 mm., and is flatly convex. 

 It seems a more rounded form than E. tenella, but is somewhat 

 suggestive of that species. 



The Radstock Area. 



An examination of the spoil-heaps of collieries in the Radstock 

 area yielded evidences of faunal horizons at several collieries. At 

 the Radstock collieries it is impossible to trace the shales back to 

 their source of origin, because the spoil-heap is the common 

 dumping-ground from several pits. The material obtained from 

 this common spoil-heap is dealt with in the accompanying palae- 

 ontological notes under the head of ' mixed material.' The spoil- 

 heap in question is that at Tyning Batch, and material from the 

 colliery at Wellsway is conveyed underground to Ludlows Colliery, 

 and thence discharged upon Tyning Batch, which also receives the 

 material from Ludlows, Middle Pit, and Tyning. This uncertainty 



