Vol. 67.] FAUNA! HORIZONS IN THE BRISTOL COALFIELD. 319 



[Section at South Liberty Colliery, cont.'] Thickness in feet inches. 



31. Coal, much slickensided 1 10 



30. Fireclay. Soft, grey, and much contorted, passing into hard 



shale below 20 2 



29. Quartzose grit, with ironstone. A few traces of plant- 

 remains ? 10 



28. Shales and mudstones, with a band of quartzose grit. The 



upper 12 feet much like a fireclay ? 35 



27. Shale. ' Marine Band,' ' Horizon 3.' Soft, dark grey, 

 and well-bedded, containing ironstone nodules. Yields 

 Anihracomya lesvis var. scotica, Pterinopecten papyraceus, 



Nucula oblonga, Estheria, and Bairdia (?) 2 8 



26. Grit. Micaceous and massive 2 



25. Shale. ' Marine Band : Horizon 2.' Dark grey, well-bedded, 

 containing ironstone nodules, Xeuropteris, Cordaites, etc., 

 Anthracomya Irecisvav. scotica, and Naiadites elongata ... 3 7 



24. Shale. Micaceous and massively -bedded 21 



23. Coal. Earthy and slickensided 3 8 



22. Fireclay and mudstone : the former slickensided, the latter 



yielding obscure plant-remains 26 3 



21. Gritstone, with nodular ironstone. Full of Stigmarian root- 

 lets and coaly streaks 32 1 



20. Black and grey shales. Micaceous, containing Sphenopteris 



and comminuted plant-remains 25 4 



ID. Coal. Bituminous and much slickensided 1 



18. Fireclay, passing into shale below. Stigmarian rootlets 



abundant; contains ironstone nodules 27 1 



17. Shales. Hard grey shale, with ironstone nodules. Contains 



An nularia and Calamites 61 4 



16. Grey grit. Much slickensided 16 10 



15. Shales and mudstones, partly crushed 44 7 



14. Grit. Massive and well-bedded 5 4 



13. Mudstone. Black and grey, containing ironstone nodules 



and many Stigmarian rootlets 29 5 



12. Coal. Much iron-stained 1 



11. Mudstone. Massive grey rock, with Stigmarian rootlets 15 10 



10. Shale and coal. Mashed-up mass of rock, slickensided every- 

 where. The shale has all the appearance of a ' Marine 



Band ' material 7 1 



9. Mudstone and grit. Massively-bedded and micaceous 15 9 



S. Black shale. 'Marine Band: Horizon 1.' A soft shale, 

 easily breaking up, containing Anthracomya Icevis var. 



scotica, Carbonicola sp., and insect-wings 4 11 



7. Mudstones. with plant-remains 78 5 



<>. Coal, partly crushed 4 10 



-"». Sandstone and shale 22 



4. Coal 2 6 



3. Sandstone. Massive grey rock, with yeins of calcite. Iron- 

 stone nodules are found in it occasionally 5 5 



2. Coal. Soft, and slickensided everywhere 7 2 



1. Sandstone. Dark-grey, fine-grained rock, with calcite-veins. 



Traces of plants 16 6 



Ashton Great Vein. 



Total 759 8 



The faunal horizons occur below the Bedminsfcer Great Vein at 

 depths (below it) of 134, 284, 286, and 637 feet, respectively. Several 

 of the black shales met with possess the characters of marine-band 

 shales, but no trace of fossils could be found. At a depth of 

 396 feet below the Bedminster Great Vein, occurs the Toad Vein ; 



