PLATE XVI. 



(Carboniferous Species.) 



1. Athyris lamellosa, L'Eveille ^= squamosa, PJiiUips, from Dovedale, Derby- 



shire. Museum of Practical Geology. 



2. — PLANOSULCATA, PhiUi])s, from the original illustration in the ' Geology of 



Yorkshire.' 



3. — — Ventral valve with marginal expansions, entire. From 



Preston. British Museum. 



4. 5, 6. — — Specimens from BoUand without their expansions, fig. 4. 



Collection of Mr. E. Wood. Eig. 5, from Longnor, 

 Derbyshire. Museum of Practical Geology. 

 7, 8, 9. — — Specimens with portions of their expansions, 7, showing 



the spiral appendages and marginal lamellae, Derby- 

 shire. Eig. 9, from Longnor. Museum of Practical 

 Geology. 

 10, IL — — Erom L-eland. Eig. 11, is one of Professor M'Coy's 



representations of his Antinoconehus paradoxus, (fig. 6, 

 of the ' Synopsis.') 



12. — — var. obtusa, M'Coy. Erom the figure in the 'Synopsis.' 



13. — — var. oUoncja, Sow. Erom the figure in the 'Mineral 



Conchology.' 



15. — — Erom Lanarkshire, Scotland. 



14,16,18. — EXPANSA, Phillips. Erom Kendal. Eigs. 14, 16, 17, from the collection 



of the late Mr. D. Sharpe ; now forming part of the Museum 

 of the Geological Society. Eig. 18, in the cabinet of Mr. 

 Reed, of York. 



