PLATE XI. 



Fig. 1. — Streblopteria laevigata. A left valve from Caherass, co. Limerick. In 

 the Collection of the Geological Survey of Ireland. (Page 43.) 



Fig. 2. — Streblopteria laevigata.. A left valve, showing the anterior ear. Same 

 locality and Collection. (Page 48.) 



Fig. 3. — Streblopteria laevigata. The type specimen, from Millicent, Kildare. In 

 the Griffith Collection, Science and Art Museum, Dublin. (Page 48.) 



Fig. 4. — Streblopteria laevigata. A right valve from Lowick. In the Collection 

 of the Woodwardian Museum, Cambridge. (Page 48.) 



Fig. 5. — Streblopteria laevigata. Portion of a right valve, showing the anterior- 

 ear. From Cloghran, co. Dublin. My Collection. (Page 48.) 



Fig. 6. — Streblopteria laevigata. The left valve of Fig. 5, showing colour bands. 

 The anterior ear is broken off. (Page 48.) 



Fig. 7. — Streblopteria laevigata. A right valve. From Doohylebeg, co. Limerick. 

 In the Collection of the Geological Survey of Ireland. (Page 48.) 



Fig. 8. — Eumicrotis oralis. A left valve. From co. Cork. In the York 

 Museum. (Page 40.) 



Fig. 9. — Eumicrotis oralis. A left valve. From Settle. In the Woodwardian 

 Museum, Cambridge. (Page 4(3.) 



Fig. 10. — Streblopteria ornata. Right and left valves. From River Gryfe, near 

 Crosslea Mill, Houston. In the Collection of the Geological Survey of Scotland. 

 (Page 50.) 



Fig. 11. — Streblopteria ornata. A left valve. From Waygateshaw Limestone 

 Pit, Carluke. Same Collection. (Page 50.) 



Fig. 12. — Streblopteria ornata. The cast of a right valve. From same Col- 

 lection. (Page 50.) 



Fig. 13. — Pterinopecten eximius. A right valve, with portion of the left valve 

 showing below the lower margin. From St. Doulaghs, co. Dublin. Collection of 

 the Woodwardian Museum, Cambridge. (Page 60.) 



Fig. 14. — Pterinopecten eximius. A left valve, somewhat sheared. From the 

 Lower Limestone S hales, Clonakilty, co. Cork. Collection of the Geological 

 Survey of Ireland. (Page 60.) 



