PLATE III. 



Fig. Page. 



1. Sinuites soudleyensis, sp. nov. Internal cast. Sinus view. X \\. Bala 



Series, Soudley. Sedgwick Mus. 13. 



2. Ditto. Internal cast of young shell, front view, x \\. Same horizon, 



locality and collection. 1-3. 



3. Ditto. Ornament of second layer of shell. X 5. Bala Series, Hor- 



derley. Mus. Pract. Geol. [28028]. 13. 



4. Sinuites suhrectangularis, sp. nov. Internal cast. Side view. X I4. 



Drummuck Group, Thraive Glen, Girvan. Mrs. Gray's Coll. 14. 



4 a. Inferior view. X 1^. 



5. Ditto. Internal cast. Side view (compressed shell). X 1\. Same 



horizon, locality and collection. 14. 



6a. Ditto. Sinus view. X ^^. 



6. Ditto. Dorsal view, showing ornament on shell. X 1 j. Same horizon, 



locality and collection. 14. 



7. Ditto. Internal cast. Globose form. Sinus view. X 1^. Same 



horizon, locality and collection. 14. 



8. Ditto. Internal cast. Narrow foriu. Sinus view. X l^^. Same horizon, 



locality and collection. 14. 



9. Ditto. Internal cast. Narrow form. Dorsal view. Nat. size. Same 



horizon, locality and collection. 14. 



10. Ditto. Internal cast. Narrow form. Side view. Nat. size. Same 



horizon, locality and collection. 14. 



11. Ditto. Side view of specimen with shell preserved, x I5. Drummuck 



Group, Girvan. Geol. Surv. Mus. Edinb. [M. 2888 B.] 15. 



11 (X. Dorsal view. lib. Inferior view. 11^;. Ornament on dorsal edge. X 3. 



12. Sinuites ? separatus, sp. nov. Internal cast. Side view. X 1^. Bal- 



clatchie Group, Balclatchie. Mrs. Gray's Coll. 16. 



12a. Dorsal view. X Ij. 



13. Sinuites sphsevoidalis, sp. nov. Internal cast with portion of shell 



preserved. X 2. Balclatchie Group, Balclatchie. Mrs. Gray's Coll. 16. 

 13 a. Ornament. X 10. 



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



collection. 16. 



14a. Dorsal view. X 2. 



15. Siiiuitopsis congruens, sp. nov. Side view. X 2. Balclatchie Grouj), 



Balclatchie. Mrs. Gray's Coll. 18. 



15a. Sinus view. X 2. 15^. Front view. 



