CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 109 



4. Spondylus sp. indet. Height of fragment 31 mm. Soldado Rock. Lignitic Eocene 41 



5. Pecten sp. indet. Cast of interior. Height 6 mm. Brighton, Trinidad. Oligocene 



6. Perna obliqua Lam. Young shells. Burrowing in solid rock. Height of shell 10 mm. 



Black Rock, Gulf of Paria. Recent 41 



7. Inoceramus labiatus Schloth. [plicatus (d'Orb.) Krst.] Height 55 mm. Hurupu, 



Venezuela. Probably Turonian 41 



8. Inoceramus labiatus Schloth. ^ Same locality. Showing variations in groovings 41 



9. Modiola cf. alabamensis Aldrich. Length 23 mm. Soldado Rock. Lignitic Eocene 43 



10. Area (Argina) schultzana n. sp. Length 35 mm. Gulf of Paria, Brighton, Trinidad. 



Recent 46 



11. Area (Argina) schultzana n. sp. Interior of same valve showing hinge 46 



12. Area (Argina) schultzana n. sp. Lateral view, same valve 46 



13. Area (Cunearca) chemnitzioides n. sp. Mould in ferruginous marl. Lateral view 



showing unequal valves. Brighton. Oligocene 44 



14. Area ( Cunearca) chemnitzioides n. sp. Internal mould showing high, triangular form. 



Length 22 mm. Brighton. Oligocene 44 



15. Area (Cunearca) chemnitzioides n. sp. From a gutta-percha impression showing sur- 



face sculpture. Same locality 44 



16. Area sp. indet. Length of fragment 18 mm. Brighton. Oligocene 47 



Fig. 1. 



3. 



4. 

 5. 

 6. 



7. 



9. 

 10. 



11. 

 12. 



13. 



14. 



15. 

 16. 



17. 



18. 



19. 



Fig. 1. 

 2. 



3. 



4. 



6. 



7. 



PLATE VIII. 



Page 



Area (Cunearca) chemnitzioides n. sp. From a gutta-percha impression, showing 



cardinal area. Striations exaggerated by erosion. Brighton. Oligocene 44 



Area (Argina) billingsiana n. sp. Length 31 mm, Brighton, Trinidad. Upper 



Oligocene 45 



Area (Argina) billingsiana n. sp. Interior of same shell 45 



Area (Argina) brightonensis n. sp. Length 24 mm. Brighton. Oligocene 46 



Area (Argina) brightonensis n. sp. Same shell, lateral view 46 



Area (Argina) brightonensis n. sp. Interior of same shell showing hinge characters . . 46 

 Area (Argina) pariaensis n. sp. Length 24 mm. Gulf of Paria between La Brea and 



San Fernando. Recent 47 



Area (Argina) pariaensis n. sp. Interior of same shell showing hinge characters .... 47 



Area (Argina) pariaensis n. sp. Lateral view of same shell 47 



Area (Noetia) sheldoniana n. sp. Length 15 mm. Brighton, Trinidad. Upper 



Oligocene 43 



Area ( Noetia) sheldoniana n. sp. Interior of same valve 43 



Cucullcea harttii Rathbun. Length 29 mm. Soldado Rock, Gulf of Paria. Midway 



Eocene 48 



Glycymeris (Axinea) viamedice n. sp. Height 16 mm. Soldado Rock. Midway 



Eocene 49 



Venericardia crucedemaionis n. sp. Length approximately 7 mm. Soldado Rock. 



Lignitic Eocene 51 



Venericardia planicosta Lamarck. Width 55 mm. Soldado Rock. Midway Eocene 51 

 Venericardia planicosta Lam. Interior mould with fragmentary margin of exterior. 



Width 48 mm. Soldado Rock. Midway Eocene 51 



Venericardia thalassoplekta n. sp. Height 19 mm. Soldado Rock. Midway Eocene 53 

 Unio sp. indet. Interior mould. Showing alternating teeth. Length of fragment 70 



mm. Between La Brea and San Fernando, Trinidad. Probably Oligocene 50 



Unio sp. indet. Same species as above. Another mould showing general form, 



medial sulcus, and anterior muscular scar 50 



PLATE IX. 



Page 



Unio f 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) virginim n. sp. Interior mould of above shell 53 



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



Cretaceous? 54 



Cardium (Trigoniocardia) Carolines 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 





