PLATE XXVI. 



Fig. 1. — Sedgwichia gigantea. M'Coy'stype specimen preserved in the Griffith 

 Collection of the Museum of Science and Art, Dublin. (Page 278.) 



Fig. 2. — Sedgwichia gigantea. A full-grown, much crushed specimen. From 

 the Schizodus pentlandicus bed, Randerston, Fife. My Collection. (Page 278.) 



Fig. 3. — Sedgiviclcia gigantea. A cast of the interior. From Magazine, 

 Midlothian. My Collection. (Page 278.) 



Fig. 4. — Sedgwichia scotica. A very fine example. From the McDonald Lime- 

 stone beds of Muirkirk. In the Collection of Mr. Adam Whyte, of Muirkirk. 

 (Page 283.) 



Fig. 4 a. — Sedgwichia scotica. The same specimen viewed from above. 



Fig. 5. — Sedgwichia scotica. A medium-sized example. From the Lower 

 Limestone series of Bath. In the Collection of Mr. J. Neilson. (Page 283.) 



Fig. 6. — Sedgwichia scotica. A larger specimen. From the same locality at 

 Muirkirk. My Collection. (Page 283.) 



Fig. 7. — Sedgwichia scotica. A specimen with the anterior concentric lines of 

 growth very well preserved. From Beith. My Collection. (Page 283.) 



Fig. 8. — Sedgwichia ovata. A portion of a cast of a right valve, showing the 

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

 (Page 281.) 



Fig. 9. — Sedgwichia ovata. A fairly perfect bivalve example. Same locality. 

 My Collection. (Page 281.) 



Fig. 9 a. — Sedgwichia ovata. The same specimen viewed from above. 



Fig. 10. — Sedgwichia ovata. A specimen of a testiferous right valve of 

 average size. Same locality. My Collection. (Page 281.) 



Fig. 11. — Sedgwichia ovata. A specimen from the Scorpion beds of Glen- 

 cartholne, Eskdale. My Collection. (Page 281.) 



