PLATE X. 



Fig. Page - 



1. Bucaniopsis expansus (Sowerby). Dorsal view (shell preserved). X 2. 



Upper Ludlow, Ludlow. Mus. Pract. Geol. [28079]. 60. 



la. Ditto. Ornamentation of same specimen. X 10. 60. 



2. Ditto. Dorsal view of another specimen. X 2. Ludlow Beds, Frith 



Farm, Malvern. Mus. Pract. Geol. [28078]. 60 



3. Ditto. Dorsal view of internal cast. X 2. Upper Ludlow, near 



Ludlow. Sedgwick Mus. <"><>. 



I. Ditto. Ditto. X 3. Upper Ludlow. Dinas Bran, Llangollen. Sedg- 

 wick .Mus. 60. 



5. Bucaniopsis forbesi, sp. nov. Front view. x \\. Whitehouse Group, 



Shalloch Mill, Girvan. Mrs. Gray's Coll. 61. 



5a. Ditto. Dorsal view of same specimen. X 2. 01. 



■ )h. Ditto. Ornamentation of same specimen. X 10. 61. 



('). Ditto. Side view of distorted specimen. X 2. Same horizon, locality 



and collection. 01. 



7. Bucaniopsis nicoli, sp. nov. Dorsal view. X 1^. Drunimuck Group, 



Thrai^e Glen, Girvan. Mrs. Gray's Coll. 61. 



la. Ditto. Ornamentation of same specimen, x 14. 61. 



8. Ditto. Impression of exterior of apertural region of another specimen. 



X 1]. Same horizon, locality and collection. til. 



9. Ditto. Side view of internal east. X 1 \. Same horizon, locality and 



collection. til. 



10. Cymbularia alata, (Portlock). Dorsal view, x 1.1- Bala Beds, Desert- 



creat, Tyrone. Mus. Pract, Geol. [27998]. 63. 



11. Ditto. Ditto, x 1 L Same horizon, locality and collection [28000]. 63. 



12. Cymbularia cavinata (Sowerby). Side view of internal cast, x 3. 



Upper Ludlow, Horeb Chapel, Llandovery. .Mus. Pract. Geol. 

 [6655]. 64. 



13. Ditto. Var. Side view of internal cast. Upper Llandovery, Bogmine, 



Shelve. Mus. Pract. Geol. [28065]. 66. 



14. Ditto. Var. Posterior view of internal cast. Sana 1 horizon, locality 



and collection [280.62]. 66. 



15. Cymbularia drummuchensis, sp. nov. Dorsal view. X 3. Drummuck 



Group, Thraive (den, Girvan. Mrs. Gray's Coll. 66. 



16. Ditto. Side view of another specimen. X 1.!. Same horizon, locality 



and collection. ti(i. 



17. Ditto. Dorsal view of another specimen, x 1 \. Same horizon, locality 



and collection. 66. 



18. Ditto. Front view of another specimen. X 1^- Same horizon, locality 



and collection. 00. 



19. Ditto. Side view of internal cast. X \\. Same horizon, locality and 



collection. (if>. 



20. Cymbularia merita, sp. nov. Front view, x 2. Wenlock Shale, 



Dudley. Brit. Mus. [G. 73904.,]. 68. 



