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Fig. 1. 

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3. 



4. 



10. 

 11. 



12. 



13. 

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 15. 

 16. 

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27. 

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 33. 



PLATE IX. 



Page 



Uniof sp. indet. Height 90 mm. Trinidad. Probably Oligocene 50 



Cardita (Carditamera) virginice n. sp. Length 13 mm. Interior mould showing 



negative of sculpture. Brighton. Oligocene 53 



Cardita (Carditamera) virginice n. sp. Interior mould of above shell 53 



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



Cretaceous? 54 



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



Oligocene 54 



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



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



Upper Cretaceous 54 



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

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



Lignitic Eocene 56 



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

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



Midway Eocene 58 



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



Trinidad. Upper Oligocene 56 



Pitaria (Lamelliconcha) circinata Born. Interior of same shell 56 



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



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



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



Chione veatchiana n. sp. Length 25 mm. Brighton, Upper Oligocene 58 



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



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



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



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



Eocene 60 



Mactra austeniana n. sp. Length 27 mm. Brighton, Trinidad. Upper Oligocene. . . 61 



Mactra austeniana n. sp. Interior of same shell showing hinge characters 61 



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



Eocene 62 



Corbula (Cuneocorbula) helence n. sp. Length 8 mm. Brighton, Trinidad. Upper 



Oligocene 62 



Corbula sp. indet. Interior moulds. Length 11 mm. Brighton. Oligocene 64 



Corbula sp. indet. Lateral view of same mould 64 



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



Eocene 63 



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



Upper Oligocene 63 



Corbula (Bothrocorbula) smithiana n. sp. Same shell, interior 63 



Pholas mackiana n. sp. Length of fragment 21 mm. Brighton, Trinidad. Oligocene 64 



Martesia oligocenica n. sp. Interior mould. Length 14 mm. Brighton. Oligocene . 65 



Martesia oligocenica n. sp. Same mould: anterior view showing gape of valves 65 



1; 





r 



3' 



