PLATE XLVIII. 



CARBONIFEROUS SPECIES. 



Fig. 

 1, 2. Crania quadrata, M'Coy. Fig. 1 from the original figure in the 'Synopsis;' fig. 2 from the 



original specimen in the collection of Sir R. Griffith, Rahans Bay, 

 Dunkineely, Ireland. 

 3- — 12. „ ,, Different Scottish examples, from the Carboniferous shales of Carluke, Capelrig, 



Calderside, &c. These figures show the exterior of the upper valve and 

 the interior of the lower or attached one. Figs. 6, 11, and 12, show how 

 irregular the shell sometimes becomes from being too closely clustered round 

 some marine object. 



13. „ „ Interior of the upper valve, from Capelrig, collection of Mr. J. Armstrong. 



14. Cranial trigonalis, M'Coy. From the original specimen in the collection of Sir R. Griffith. 



14 a - Magnified view, from Lisnapaste, Ballintra. 



15. ,, 1 Ryckholtiana, De Kon. = Crania vesiculosa, M'Coy, from the figure in the ' Synopsis of 



the Carboniferous Fossils of Ireland.' Carboniferous limestone, Mille- 

 cent, Ireland. 



16. „ ,, Another example, in the collection of Mr. Humphreys. 



17. „ ? ,, From Castleton, in Derbyshire. 



18 — 25. Discina nitida. Different specimens, chiefly from the Carboniferous shales of Capelrig, Auchen- 



tibber, and Carluke, in Scotland. Fig. 18 represents the var. B. bulla, M'Coy, 

 from Gare, Lanarkshire. Fig. 20 h is a portion of the shell enlarged. 



26. ,, Davreuxiana, De Koninck 1 From the Carboniferous limestone of Little Island, near 



Cork, Ireland, collection of Mr. J. Wright. 



27, 28. Lingula Scotica, Dav. Fig. 28 from the Carboniferous shales of Hall Hill, near Lesmahago, and 



collection of Dr. Slimon. Fig. 29 from Gare, collection of Mr. J. 



Armstrong. 

 29, 30. ,, mytiloides, Sow. From the original figures in the ' Mineral Conchology.' Walsingham, 



Durham ; British Museum. 

 31 — 33. ,, „ From Craigenglen and Capelrig, Scotland. 



34. „ „ = L. elliptica, Phillips. From the original figures in the ' Geol. of York- 



shire.' 



35. ,, ,, =.L. parallela, Phil. From the original figures in the ' Geol. of Yorkshire.' 



36. „ ,, = L. marffinata, Phil. From the original figure in the ' Geol. of Yorkshire.' 



37. „ latior, M'Coy. From the original figure in the ' British Palaeozoic Fossils.' 



38 — 40. ,, Credneri. From drawings by Mr. Kirkby. Carboniferous shales of Rynope 'Winning, 



near Sunderland, collection of Mr. Kirkby. 



