fLATE IX. 



Pag. 



Fig. 1. Uniot sp. indet. Height 90 mm. Trinidad. Probably Oligocene 50 



2. Cardita (C ' arditamera) Virginia n. sp. Length 13 mm. Interior mould showing 



negative of sculpture. Brighton. Oligocene 53 



3. Cardita (C 'arditamera) Virginia n. sp. Interior mould of above shell 53 



4. Crassatellites f sp. indet. Young. Length 8 mm. Coycuar, Venezuela. Basal Upper 



Cretaceous? 54 



5. Cardium (Trigoniocardia) Carolina n. sp. Height 11 mm. Brighton, Trinidad. 



Oligocene 



54 



6. Cardium (Trigoniocardia) Carolina n. sp. Same shell. Lateral view 54 



7. Protocardia coycuarensis n. sp. Length 24 mm. Near Coycuar, Venezuela. Basal 



Upper Cretaceous 54 



8. Meretrix cf. nuttalliopsis Heilprin. Length 26 mm. Soldado Rock. Lignitic Eocene 55 



9. Meretrix subimpressa var. golfotristensis new var. Length 20 mm. Soldado Rock. 



Lignitic Eocene 



56 



10. Callista mcgrathiana Rathbun. Length 24 mm. Soldado Rock. Midway Eocene .. . 57 



11. Callista mcgrathiana var. rathbunensis new var. Length 21 mm. Soldado Rock. 



Midway Eocene 58 



12. Pitaria (Lamelliconcha) circinata Born. Young shell. Length 10 mm. Brighton, 



Trinidad. Upper Oligocene 



13. Pitaria (Lamelliconcha) circinata Born. Interior of same shell 



56 

 56 



14. Pitaria (Lamelliconcha) labreana n. sp. Length 17 mm. Brighton. Upper Oligocene 57 



1 5. Pitaria (Lamelliconcha) labreana n. sp. Interior of same valve 57 



16. Chione dalliana n. sp. Length 20 mm. Brighton, Trinidad. Upper Oligocene 59 



58 



17. Chione veatchiana n. sp. Length 25 mm. Brighton, Upper Oligocene 



18. Chione veatchiana n. sp. Same shell. Interior showing hinge characters 58 



19. Chione guppyana n. sp. Length 19 mm. Brighton, Trinidad. Upper Oligocene 59 



20. Chione paraensis White var. Length 8 mm. Soldado Rock. Midway Eocene 60 



21. Venerupis atlantica n. sp. Length of fragment 13 mm. Soldado Rock. Lignitic 



Eocene 



22. Mactra austeniana n. sp. Length 27 mm. Brighton, Trinidad. Upper Oligocene 



23. Mactra austeniana n. sp. Interior of same shell showing hinge characters 



60 



61 

 61 



24. Corbula (Cuneocorbulo) subengonata Dall. Height 65 mm. Soldado Rock. Lignitic 



Eocene 



62 



25. Corbula (C uneocorbula) helena n. sp. Length 8 mm. Brighton, Trinidad. Upper 



Oligocene 



26. Corbula sp. indet. Interior moulds. Length 11 mm. Brighton. Oligocene 



27. Corbula sp. indet. Lateral view of same mould 



62 

 64 

 64 



28. Corbula (Cuneocorbulo) weaveri n. sp. Length 8 mm. Soldado Rock. Lignitic 



Eocene 



63 



29. Corbula (Bothrocorbula) smithiana n. sp. Length 8.5 mm. Brighton, Trinidad. 



Upper Oligocene 



63 

 63 



30. Corbula (Bothrocorbula) smithiana n. sp. Same shell, interior t ^ 



31. Pholas mackiana n. sp. Length of fragment 21 mm. Brighton, Trinidad. Oligocene 



32. Martesia oligocenica n. sp. Interior mould. Length 14 mm. Brighton. Oligocene . ^ 



33. Martesia oligocenica n. sp. Same mould : anterior view showing gape of valves 



