PLATE XIII. 



(Carboniferous Species.) 



1, 2, 3. Spirifera ei,liptica, Phillips. Ireland. Fig. 1, from the original specimen 



in the British Museum ; 2, from the collection of Mr. 

 Rose, of Edinburgh ; 3, a young shell from Millecent. 



4. — lineata, Martin. From the original representation in the * Petrifi- 



cata Derbiensia.' 



5. — — From Dryden, near Edinburgh. 



6 — 10. — — Diflferent ages. Fig. 6, from Millecent ; 7, Lowick; 8, a 



specimen very finely reticulated, Craven district; 9, a 

 very large example from Dovedale, Derbyshire, Mu- 

 seum of Practical Geology; 10, profile view of an aged 

 individual from Bolland, collection of Mr. Muschen. 

 11 — 12. — — y^x. reticulata, Sow. Fig. 11, from Millecent, Ireland; 



12, Dovedale, Derbyshire, Museum of Practical Geology. 



13. — — var. reticulata, M'Coy. From the original figures in the 



' Synopsis.' 



14. — carlukiensis, Dav. From the Carboniferous shales of Carluke, 



Lanarkshire. 14, natural size ; 14 «, h, c, enlarged. 



15. — FDSiFORMis, Phillips. From the original specimen in the British 



Museum. Bolland. 



16. — MOSQUENSis, Fischer. A fine specimen. From Ragreagh, Limerick. 



in the Museum of Geological Survey of Ireland. 



