PLATE XI. 



Fig. Page. 



1. Cymbularia twnbulli, sp. nov. Posterior view of internal east. X 2. 



Llandovery Beds, Gas Works, Haverfordwest. Sedgwick Mus. 68. 



2. Ditto. Side view of another specimen. X 2. Same horizon, locality 



and collection. 68. 



3. Ditto. Ditto. X 1 1- Same horizon, locality and collection. 68. 

 L Ditto. Impression of part of dorsum. X 6. Same horizon, locality 



and collection. 68. 



5. Cymbularia youngi, sp. nov. Front view, x H. Whitehouse Group, 



Shalloch Mill, Girvan, Mrs. Gray's Coll. 69. 



0. Ditto. Posterior view of another specimen, x 2. Same horizon, locality 



and collection. 69. 



7. Ditto. Side view of another specimen. X \\. Same horizon, locality 



and collection. 69. 



8. Ditto. Side of shell showing ornamentation. X 3. Same horizon, 



locality and collection. 69. 



9. Cymbularia ? woodlandensis, sp. nov. Side view. Nat. size. Saugli Hill 



Group, Woodland Point, Girvan. Mrs. Gray's Coll. 70. 



10. Ditto. Ditto. Nat. size. Same horizon, locality and collection. 70. 



11. Cymbularia cf. fas figiata (Lindstrom). Posterior view of crushed speci- 



men. X 2. Lower Ludlow, Vinnal Hill. Mus. Tract. Geol. [28094]. 7<>. 

 1 la. Ditto. Apertural edge of dorsum of same specimen. Nat. size. 70. 



12. Ditto. Side view of another specimen. X 2. Same horizon, locality 



and collection [28096]. 70. 



13. Zonidiscus grayi, sp. nov. Dorsal view, x 1^. Druminuck Group, 



Thraive Glen, Girvan. Mrs. Gray's Coll. 71. 



14. Ditto. Side view of another specimen. X 1^. Same horizon, locality 



and collection. 71. 



1.5. Ditto. Internal cast of another specimen. x H- Same horizon, 



locality and collection. 71. 



16. Zonidiscus grayi var. shallochensis, nov. Side view, x H. Whitehouse 



Group, Shalloch Mill, Girvan. Mrs. Gray's Coll. 73. 



17. Ditto. Ditto. X 2. Same horizon, locality and collection. 73. 



18. Zonidiscus ? transiens, sp. nov. Side view. x 3. Balclatchie Group, 



Ardmillan, Girvan. Mrs. Gray's Coll. 73. 



19. Ditto. Dorsal view of another specimen, x 3. Same horizon, locality 



and collection. 7:]. 



20. Ditto. Sinus view of another specimen. x 2. Same horizon, locality 



and collection. 73. 



21. Ditto. Side view of internal cast. X 2. Same horizon, locality and 



collection. 73. 



21a.. Ditto. Dorsal view of same specimen. x 2. 73. 



22. Salpingostoma asteroid earn, sp. nov. Dorsal view. Nat. size. Drum- 



muck Group, Thraive Glen, Girvan. Mrs. Gray's Coll. 75. 



23. Ditto. Ditto. Nat. size. Same horizon, locality and collection. 75. 



