8- 



-11 



. — 



12. 





— 



13. 





— 



14, 



15, 



16. 



PLATE VII. 



(Carboniferous Species.) 

 Fig. 

 1, 2. Spirifera crassa? De Koninck. Millecent, Ireland. 



3. — In this specimen no mesial fold is observable. From tbe lower limestone of 



Milverton, Skerrie, Ireland. Collection of Mr. Griffith. 



4. — bisulcata. A malformation. This illustration is taken from tbe specimen named 



Sp. calcarata by M'Coy. ' Synopsis of tbe Carboniferous Fossils of 

 Ireland,' pi. xxi, fig. 3. 

 5,6. Spirifera acuta, Martin. From the 'Pet. Derb.,' tab. xlix, figs. 15, 16. Loc. Winster, 



Derbyshire. 

 7. Spirifera grandicostata, M'Coy. Bolland. British Museum. 



— A beautiful example from Bolland. Collection of Mr. Muschen. 



— Front view of a specimen from Park Hill, Longnor, Derbyshire. Museum 

 of Practical Geology. 



— A very large ribbed specimen, from Bolland. Collection of Mr. E. Wood. 



— A young shell, from Park Hill, Longnor. Museum of Practical Geology. 



Young shells. 15. Collection of Mr. E. Wood. 

 17. Spirifera laminosa, M'Coy. Drawn from two examples in the collection of Mr. Griffith. Hook, 



Ireland. 

 18,19. — — From Hook. Museum of the Geological Survey of Ireland. 



20. — — A young shell from Hook. 



21, 22. — — A var. from Derbyshire. Cambridge Museum. 



23. Spirifera decemcostata, M'Coy. From tbe original specimen. ' Synopsis of the Carboniferous 



Fossils of Ireland,' pi. xxii, fig. 9. Millecent ; Kildare. Collection of 

 Mr. Griffith. 



24. — mesogonia, M'Coy. 'Synopsis of the Carboniferous Fossils of Ireland,' tab. xxii, fig. 13. 



Ireland. 



25 — 28. Spirifera planata, Phillips. Bolland. Collection of Mr. Muschen. 



29. — — Professor Phillips's type. British Museum. Bolland. 



30 — 32. — — Collection of Professor Phillips. Bolland. 



33, 34. — — A circular specimen in the collection of Mr. Muschen. 



35. — — Collection of Professor Phillips. Bolland. 



36. — . — Young shell in the collection of Mr. Muschen. 



37 — 41. Spiriferina cristata, var. octoplicata, Sowerby. From the original examples. 'Min. Con.,' 



tab. 562, figs. 2 and 3. Derbyshire, and collection of Mr. J. de C. 

 Sowerby. 

 42 — 44. — — From the shores of Lough Hill, County Sligo. Collection of the 



Geological Society. Fig. 44 enlarged, to show the cardinal area, 

 cardinal process, and central septum of the ventral valve. 

 45 — 46. — — From Westlothian, Scotland. Collection of Dr. Fleming. 



47. — — From the shores of Lough Hill, County of Sligo. Collection of the 



Geological Society. 

 48,49,50. — insculpta, Phillips. Young shells from Longnor, Derbyshire. Museum of Practical 



Geology. 

 51. — — From the specimen named Sp. qxdnquelobus, M'Coy. 'Synopsis,' 



tab. xxii, fig. 7. From Ardagh, Drumcondra, Ireland. Collection 

 of Mr. Griffith. 

 52 — 55. — — Adult. Yorkshire. Museum of Practical Geology. 



56 — 59. — minima, Sowerby. From the two figured types. ' Min. Con.,' tab. 377. Bakewell. 



Collection of Mr. J. de C. Sowerby. 

 60—61. — partita, Portloch. Copies from the ' Rep. of the Geol. of Londonderry, &c.,' tab. 



xxxviii, fig. 3. Ireland. 



