PLATE XXXIII. 



Fig. 1. — Edmondia Lowickensis. A perfect specimen. From the Index 

 Limestone series of Thornliebank, Scotland. In the Collection of Mr. J. Neilson. 

 (Page 296.) 



Fig. 1 a. — The same specimen viewed from above. 



Figs. 2, 3. — Edmondia Lowickensis. The cast of a left valve, which shows the 

 groove for the lamellar process of the hinge (not in the figure). From one of 

 the limestones at Lowick. In the Collection of the Woodwardian Museum, 

 Cambridge. (Page 296.) 



Fig. 4. — Edmondia LoivicJcensis. The cast of a left valve, showing the 

 adductor muscle-scars and pallial line. Same locality and Collection. (Page 

 296.) 



Fig. 5. — Edmondia compressa. The anterior half of a left valve. From the 

 upper beds of the Carboniferous Limestone, Thorpe Cloud, Derbyshire. My 

 Collection. (Page 304.) 



Fig. 6. — Edmondia compressa. A left valve. From the upper beds of the 

 Carboniferous Limestone, Castleton, Derbyshire. My Collection. (Page 304.) 



Fig. 7. — Edmondia compressa. The type specimen figured by M'Coy. Pre- 

 served in the Griffith Collection of the Museum of Science and Art, Dublin. 

 (Page 304.) 



Figs. 8, 9. — Edmondia compressa. Two examples of medium size. From the 

 same locality as Fig. 6. My Collection. (Page 304.) 



Fig. 10. — Edmondia Josepha. A testiferous example. From the shales of the 

 Lower Limestone series of Beith, Ayrshire. My Collection. (Page 294.) 



Fig. 11. — Edmondia Josepha. A cast showing the details of the interior and 

 the lamellar process of the hinge-plate. Same locality. My Collection. (Page 

 294.) 



Fig. 12. — Edmondia Josepha. A very fine testiferous example. From the same 

 locality. My Collection. (Page 294.) 



Fig. 12 a. — Edmondia Josepha. The same specimen viewed from above. 



Fig. 13. — Edmondia Josepha. A cast. From a marine band in the Calciferous 

 Sandstone series of Fife. My Collection. (Page 294.) 



Fig. 14. — Edmondia Josepha. The cast of a young example. From Beith. 

 My Collection. (Page 294.) 



Fig. 15. — Edmondia sulcata. A small example. A cast from the Limestone at 

 Lowick, Northumberland. In the Woodwardian Museum, Cambridge. (Page 

 318.) 



Fig. 16. — Edmondia expansa. A very fine example. From the Carboniferous 

 Limestone of Halkyn Mountain, North Wales. In the Collection of the Grosvenor 

 Museum, Chester. (Page 322.) 



Fig. 16 a. — Edmondia expansa. The same specimen viewed from above. 



