PLATE LIV. 



CARBONIFEROUS AND PERMIAN RECURRENT SPECIES. 



Fig. 



1. Terebratula hastata, Sow. Carboniferous limestone, Settle, Yorkshire. 



2. ,, elongata, Schlotheim. Permian limestone, Humbleton Hill, Durham. Col- 



lection of Mr. J. Kirkby. 



3. „ hastata, Sow.; var. Gillingensis, Dav. Carboniferous limestone, Gilling, 



Yorkshire. 



4. ,, elongata, Schlotheim. Permian limestone, Tunstall Hill. 



5. „ sacculus, Martin. Carboniferous limestone, Bolland, Yorkshire. 



6. ,, sufflata, Schlotheim. Permian limestone, Tunstall Hill, Durham. 



8. Athyris Royssii, UEveille. Carboniferous shales, Brockley, near Lesmahago, Lanarkshire, 



Scotland. 



9. „ pectinifera, /. de C. Sow. Permian limestone, Humbleton, Durham. 



10 and 12. Spiriferina octoplicata, Sow. Carboniferous limestone and shale. Fig. 10, Sowerby's type 



(' Min. Con. Tab,' 562, fig. 2), Derbyshire. Fig. 12 from 

 East Kilbride, Lanarkshire, Scotland. 



11 and 13. ,, cristata, Schlotheim. Permian limestone of Tunstall Hill, collection of Mr. 



J. Kirkby. 



14. Spirifera Urii, Fleming. Carboniferous shales near Carluke, Lanarkshire, Scotland. 



15. „ Clannyana, King. Permian limestone, Tunstall Hill, Durham. 



16. 17, 18. Camarophoria crumena, Martin, sp. Carboniferous limestone of Derbyshire, and of 



Settle, in Yorkshire. 



19. „ Sclotheimi, Von Buck. Permian limestone, Tunstall Hill. 



20, 21, 22. ,, rhomboidea, Phillips. Carboniferous limestone, Settle, Yorkshire. 

 23, 24, 25. „ globulina, Phillips. Permian limestone, Tunstall Hill. 



26. Discina nitida, Phillips. Carboniferous shales, Capelrig, Lanarkshire, Scotland. 



27. „ Koninckii, Geinitz. Permian compact limestone, East Thickley, Durham. 

 28,29,30,31. Lingula mytiloides, Sow. Carboniferous limestone and shales. Figs. 28,29, Sowerby's 



types, from Walsingham, Durham. Var. L. Credneri, Figs. 



30, 31, from the Coal measures of Ryhope, Winning, near 



Sunderland, Durham, collection of Mr. J. Kirkby. 

 32, 33, 34. ,, Credneri, Geinitz. Permian marl slate and lower beds of the compact limestone 



of Ferry Hill, and East Trickley, Durham. 

 35,36,37,38. Crania Kirkbyi, Dav. Permian limestone, Tunstall Hill, collection of Mr. J. Kirkby. 

 39,40,41. ,, quadrata, M'Coy. Carboniferous shales of Capelrig, East Kilbride, Lanarkshire. 



42. Streptorhynchus pclargonatus, Schlotheim. Permian compact limestone of East Trichley. 



A very large example. 



43. Strophalosia Goldfusii, Miinster. Interior of the dorsal valve. A strongly marked example 



from the Permian limestone of Tunstall Hill, collection 

 of Mr. J. Kirkby. 



44. Productus horridus, Sow. A specimen in the Permian compact limestone of East Thickley, 



showing very long spines. Collection of Mr. T. Parker, of 

 Darlington. 

 46. Iietzia ulstrix, De Koninck. A very fine and perfect example, discovered by Mr. S. 



Carrington in the Carboniferous limestone of Wetton, 

 in Staffordshire. 



