PLATE XXXV. 



Fig. 1. — Edmondia arcuata. From the horizon of the Hurlet Limestone, St. 

 Monans, Fife. (Page 310.) 



Fig. 2. — Edmondia arcuata. The left valve of a cast, showing the anterior 

 adductor muscle-scar. From the Redesdale Ironstone beds. My Collection. 

 (Page 310.) 



Figs. 3, 4. — Edmondia arcuata. The right valves of casts. From the same 

 locality. My Collection. (Page 310.) 



Fig. 5. — Edmondia sulcata. A specimen from the Limestone of North Wales, 

 showing (a) the lamellar plate of the hinge of the left valve. In the Collection of 

 Mr. G. H. Morton. (Page 318.) 



Fig. 6. — Edmondia arcuata. A testiferous example. From the Redesdale 

 Ironstone series. My Collection. (Page 310.) 



Fig. 7. — Edmondia arcuata. A very fine specimen of a cast, showing the 

 details of the interior. Same series, Bellingham. My Collection. (Page 310.) 



Fig. 7 a.— Edmondia arcuata. The same specimen viewed from above, showing 

 the grooves from the lamellar process of the hinge, and the lanceolate depressions 

 caused by the thickening within the umbo. 



Fig. 8. — Edmondia arcuata. A small example from the same series. My 

 Collection. (Page 310.) 



Fig. 9.— Edmondia arcuata. A less transverse variety. Same locality. My 

 Collection. (Page 310.) 



Fig. 10. — Edmondia arcuata. A testiferous example of the right valve. Same 

 locality and Collection. (Page 310.) 



Fig. 11. — Edmondia sulcata. A specimen with the tuberculated periostracum 

 preserved. From Hind Og Glen, Dairy. My Collection. (Page 318.) 



Fig. 11 a. — Edmondia sulcata. A portion of the above shell magnified. 



Fig. 12. — Edmondia Pentonensis. A full-grown right valve, showing (a) the 

 internal lamellar plate of the hinge. From shale between the Limestones at Penton 

 Linns, Roxburgh. My Collection. (Page 313.) 



Fig. 13. — Edmondia Pentonensis. A left valve. Same locality and Collection. 

 (Page 313.) 



Fig. 14. — Edmondia Pentonensis. A right valve. From the Redesdale Ironstone 

 beds. My Collection. (Page 313.) 



Figs. 15, 16. — Edmondia Pentonensis. Two valves from Penton Linns. My 

 Collection. (Page 313.) 



