390 MR. n. BOLTON, F.R.S.E., ON [Feb., 1904. 



Posidoniella sp. 



As Posidonia from over tlie Gannister coal at Billinge. 

 (Hull Geol. Surv. Mem., Geology of the Country around 

 Wigan, p. 10.) 



Monotis {'/) obtusa. 



From Count Hill, north-east of Oldham, from above Gan- 

 nister coal. (Salter. Geol. Surv. Mem., Geology of Country 

 around Oldham, p. 61.) 



Aviculopecten papyraceus. 



This species occurs in the greatest abundance in the shales 

 over the Bullion or Upper Foot Seam and the Mountain 

 Four Feet. Where found in the "bawm-pots" the shells are 

 usually uncrushed and in splendid preservation. Occasion- 

 ally in the shales south of Bacup (Sharneyford) a mass of 

 what appears at first sight to be shale, three or four inches 

 in thickness, is found to consist almost wholly of the thin 

 flattened valves of this species. Roof of Mountain Four 

 Feet Seam at Trawden, Colne. (W 639, e coll. Wild, M M.) 



From above the Gannister Coal at Roebuck Low, half 

 mile ISr.E. of Oldham; Ogden Mill, five miles JST. of Oldham; 

 Shore Edge, four miles N. of Oldham; Count Hill, N.E. of 

 Oldham; Dog Hill, Oldham. 



From above the Bullion Coal at Sholver, two miles N.E. 

 of Oldham. 



From above Gannister Coal at Lower Lomax, Bury. 

 (Hull, Geol. Surv. Mem., Geology of the Country around 

 Bolton-le-Moors, p. 35.) 



, Shaley Brow, over the Bullion Coal. (Salter. Geol. 

 Surv. Mem., Geology of the Country around Oldham, p.35.) 



Roof of Bullion or Upper Foot Seam, Dulesgate, near 

 Todmorden. (P 801, e coll. Dawkins, M.M.) 



