PLATE XXXVI. 



Fig. 1. — Edmondia lamina ta. A left valve. From the Carboniferous Limestone of Thorpe, 

 Grassington. In the Collection of the Geological Survey, Jerrnyn Street. (Page 324.) 



Fig. 2. — Edmondia laminata. A left valve. From the Carboniferous Limestone of Thorpe Cloud, 

 Derbyshire. My Collection. (Page 324.) 



Fig. 3. — Edmondia laminata. A medium-sized right valve. From the Carboniferous Limestone 

 of Settle. In the Collection of the Woodwardian Museum, Cambridge. (Page 324.) 



Figs. 4—7. — Edmondia laminata. A series to show different stages of growth. From the Carbo- 

 niferous Limestone of Thorpe Cloud. My Collection. (Page 324.) 



Fig. 8. — Edmondia MacCoyii. A very young shell. Same locality and Collection. (Page 328.) 



Fig. 9. — Edmondia scalaris. A very young example. From the Carboniferous Limestone of 

 Thorpe Cloud. My Collection. (Page 327 ) 



Fig. 10. — Edmondia laminata. A specimen showing a much smoother surface, the strong ridges 

 and sulfations becoming much less marked. (Page 324.) 



Fig. 11. — Edmondia laminata. The type specimen of Phillips's Lucina laminata. Preserved in the 

 Gilbertson Collection of the Natural History Museum, South Kensington. (Page 324.) 



Fig. 12. — Edmondia laminata. The type specimen of M'Coy's Astarte quadrata. Preserved iu 

 the Griffith Collection of the Museum of Science and Art, Dublin. (Page 324.) 



Fig. 13. — Edmondia laminata, var. sublievis. A left valve. From the Carboniferous Limestone of 

 Thorpe, near Grassiugton. In the Collection of the Geological Survey, Jerrnyn Street. (Page 327.) 



Figs. 14 — 16. — Edmondia laminata, var. snbltevis. Valves showing different degrees of variation 

 in the concentric ridges. From the Carboniferous Limestone of Thorpe Cloud. My Collection. 

 (Page 327.) 



Fig. 17. — Edmondia laminata, var. snhlsevis. A cast of the interior. Same locality and 

 Collection. (Page 327.) 



Fig. IS. — Edmondia laminata, var. subleevis. From the Carboniferous Limestone of Castleton, 

 Derbyshire. My Collection. (Page 327.) 



Fig. 19. — Edmondia scalaris. A right valve. From the Carboniferous Limestone of Kildare. In 

 the Collection of the Geological Survey, Jerrnyn Street. (Page 327.) 



Fig. 20. — Edmondia scalaris. The type specimen figured by M'Coy. In the Griffith Collection 

 of the Museum of Science and Art, Dublin. (Page 327.) 



Fig. 21. — Edmondia scalaris. A full-grown left valve. From the Carboniferous Ironstone of 

 St. Dooghlas, co. Dublin. My Collection. (P;>ge 327.) 



Fig. 22. — Edmondia scalaris. A bivalve example. From the south of Ireland. In the Collection 

 of Mr. J. Neilson, of Glasgow. (Page 327.) 



Fig. 23. — Edmondia MacCoyii. A testiferous example. From the Carboniferous Limestone of 

 Park Hill, Derbyshire. In the Collection of the Geological Survey, Jerrnyn Street. (Page 329.) 



Fig. 24. — Edmondia MacCoyii. A cast of the interior. Same locality and Collection. (Page 329.) 



Fig. 25. — Edmondia MacCoyii. A young example. From the Carboniferous Limestone of Settle. 

 My Collection. (Page 329.) 



Figs. 26, 28, 30. — Edmondia MacCoyii. A series of specimens showing variation in the number 

 and distance of the concentric ridges. From Settle. In the Currow Collection of the "Woodwardian 

 .Museum, Cambridge. (Page 329.) 



Fig. 27 '. — Edmondia MacCoyii. A small testiferous example. From the Carboniferous Limestone of 

 Castleton. My Collection. (Page 329.) 



Fig. 29. — Edmondia MacCoyii. — A specimen of the left valve. Same locality and Collection. 

 (Page 329.) 



Fig. '.'A. — Edmondia laminata. — A giant specimen. From the Carboniferous Limestone of Park 

 Hill, Derbyshire. In the Collection of the Geological Survey. (Page 321.) 



