PLATE L 
{The separate lines indicate tlie length of the specimens!) 
Paeallelodon atatus, 11. sp. (Page 39.) 
Pig. 
1. Left valve, injured at the sides but showing the ornament. 1 a, upper view. Wolborough. 
Vicary Collection. 
Alloeisma dtjbium, Whidhorne, sp. (Page 4.) 
2. Left valve, retaining a fragment of the shell. 2 a, upper view. Wolborough. Vicary Collection. 
3. A larger but very defective specimen, in which the anterior side is more produced. Lummaton. 
My Collection. 
Edmondia ccelata, n. sp. (Page 2.) 
4. Eight valve, injured in front. Wolborough. Vicary Collection. 
MoDiOLOPSis lEPiDA, WMdlome, sp. (Page 41.) 
5. Cast of a specimen with the valves in contact. Wolborough. Museum of Practical Greology. 
Ctpeicaedinia scalaeis, Phillips, sp. (Page 5.) 
6. Elongate specimen. 6 a, upper view. 6 b, anterior view. Lummaton (?). Torquay Museum. 
7. Another elongate specimen, with very prominent beak and strong sinus. Lummaton. My 
Collection. 
8. Less transverse specimen, with smaller umbo and more evenly convex anterior side. Lummaton. 
My Collection. 
CxPEiOAEDiNiA STEiATissiMA, n. sp. (Page 9.) 
9. Left valve, somewhat worn, and slightly fractured. 9 a, upper view. Wolborough. Vicary 
Collection. 
10. Eight valve, obscured by matrix in front, and with rather coarser striae. Barton. Lee Collection. 
CVPEICAEDINIA EETICTJXATA, FhilUps, Sp. (Page 11.) 
11. Eight valve, showing the ornamentation very clearly, but a little defective at the infero-posterior 
region. 11 a, upper view. Lummaton. My Collection. 
12. Closed shell, with surface so much worn that the radiating striae are unseen. Wolborough. 
Museum of Practical Geology. 
13. Eight valve, similar in shape, but with rather closer radiating striae. Lummaton (?). Torquay 
Museum. 
Ctpetcaedinia ensieoemis, Whidhorne, sp. (Page 13.) 
14. Left valve, wanting umbo and perhaps rather flattened. Wolborough (?). Torquay Museum. 
15. Left valve, very defective. Lummaton. My Collection. 
16. Another left valve, very nearly perfect. Barton. Lee Collection, British Museum. 
CoNOCAEDiUM CLATHEATUM, d'Orligny. (Page 18.) 
17. Large specimen with the median region well defined. 17 a, anterior view. Lummaton. My 
Collection. 
18. Left valve of another specimen. 18 a, portion of surface enlarged. Lummaton. My Col- 
lection. 
19. A more transverse specimen, injured below. 19 a, upper view. 19 h, portion of surface of 
anterior slope enlarged. 19 c, portion of surface of posterior side enlarged. Lummaton. 
My Collection. 
20. One of Phillips's figured specimens, which is very much worn and, injured, but shows the shape of 
the rostrum. Wolborough. Museum of Practical Geology. 
