PLATE V. 



Fio. Page. 



1 . Cijytolites nodosus (Salter). Side view of type with shell preserved. X 2. 



Bala Series, Soudley. Mus. Pract. Geol. [280:^7]. 25. 



\(<. Dorsal view. X 2. lb. Ornament. X 8. 1 r. Ornament (worn), x 8. 



2. Ditto. Internal cast. Side view. X la- Bala Series, Soudley. Mus. 



Pract. Geol. [28038]. 25. 



2a. Sinus view. X 1^. 2h. Front view. X l^. 



3. Cijrtolites nodosus var. Ihnuhveriana, nov. Internal cast. Side view. 



X 2. Lower Llandovery^ Blaen y cwm. Mus. Pract. Geol. [28051] 26. 

 S(i. Dorsal view. X 2. 



4. Ditto. Internal cast. Side view, x 1^. Same horizon, locality and 



collection. Mus. Pract. Geol. [28050]. 26. 



5. Ditto. Internal cast. Side view. X 2. Same horizon and locality. 



Sedgwick Mus. 26. 



6. Ditto. Portion of dorsal slope, showing ornament. X 3. Lower Llan- 



dovery, Sevin Llettyrhyddod. Sedgwick Mus. 26. 



7. CijrtoUtes tJiraivensis, sp. nov. Internal cast. Side view. X 1 12- Drum- 



muck Group, Thraive Glen. Mrs. Gray's Coll. 26. 



8. Ditto. Internal cast. Sinus view. X li- Same horizon, locality and 



collection. 26. 



9. Ditto. Impression of exterior of umbilical portion of shell, showing orna- 



ment. X 4. Same horizon, locality and collection. 26. 



10. Ditto. Impression of portion of shell (fig. 7) near mouth, showing orna- 



ment. X 3. Same horizon, locality and collection. 26. 



11. Isospira ludtoni, sp. nov. Side view. X 2\. Whitehouse Group, Shal- 



loch Mill. Mrs. Gray's Coll. 27. 



l\a. Dorsal view. X 2\. lib. Inferior view. X 2-i. lie. Ornament. X 8. 



12. Bucaniella trilobata (Sow.). Dorsal view of internal cast. X 2. Wen- 



lock Series, Dudley. Sedgwick Mus. 28. 



