PLATE LVI. 



Fig. I. Cardita (Carditamera) catharia DaU ; Caloosahatchie Pliocene of Florida ; Ion. 



7.5 mm. ; p. 1416. 

 Fig. 2. Venericardia (Pleuromeris) tellia Dall ; Chipola Oligocene ; Ion. 3.5 mm. ; 



P- 1432. 

 Fig. 3. Cardita {Carditamera) Guppyi Dall; Pliocene of Trinidad, West Indies; Ion. 



4.0 mm.; p. 1413. 

 Fig. 4. Venericardia (Pteromeris) acaris Dall ; Oligocene marl of Bowden, Jamaica ; 



Ion. 2.5 mm.; p. 1434. 

 Fig. 5. Goodallia americana 'Da.W; Claiborne sands; Ion. 4.25 mm. ; p. 1496. 

 Fig. 6. Venericardia vicksburgiana Dall; Vicksburgian Oligocene of Martin, Florida; 



Ion. 16.0 mm. ; p. 1428. 

 Fig. 7. Venericardia prcscisa Dall ; Jacksonian Eocene of Cleveland County, Arkansas ; 



Ion. 13.2 mm. ; p. 1427. 

 Fig. 8. The same. 

 Fig. 9. Venericardia carsonensis Dall ; Eocene of Carson's Creek ; Ion. 13.0 mm. ; p. 



1427. 

 Fig. 10. Cardita (Carditamera) Vaughani Dall; Miocene of Jackson Bluff, Florida; 



Ion. 35.0 mm. ; p. 1410. 

 Fig. II. Cardita {Carditamera) Aoridana Conrad; recent, figured for comparison; 



Florida; Ion. 32.0 mm.; p. 1415. 

 Fig. 12. Venericardia simplex Dall ; Wood's Bluff Eocene ; Ion. 18.0 mm. ; p. 1426. 

 Fig. 13. Venericardia bulla Dall ; Midwayan Eocene of Texas ; Ion. 22.0 mm. ; lat. 33.0 



mm. ; p. 1424. 

 Fig. 14. The same. 

 Fig. 15. Venericardia {Pleuromeris) scitula Dall ; Oak Grove sands ; Ion. 5.0 mm. ; 



P- 1433- 

 Fig. 16. Venericardia (Cyclocardia) calif ornica Dall; Miocene of Guadalupe, California; 



Ion. 24.0 mm.; p. 1431. 

 Fig. 17. Chama draconis Dall, attached valve; Chipola Oligocene; Ion. 26.0 mm.; p. 



1399- 

 Fig. 18. Chama draconis Dall, upper valve ; Ion. 22.0 mm. ; p. 1399. 

 Fig. 19. Chama chipolana Dall, attached valve ; Chipola Oligocene ; Ion. 27.0 mm. ; p. 



1398. 

 Fig. 20. The same, upper valve ; Ion. 22.0 mm. 

 Fig. 21. Area {Acar) milimia Dall; Pliocene of Shell Creek, Florida; Ion. 18.5 ; diam. 



lo.o mm. 

 Fig. 22. Cyreiia {Pseudocyrena) dupliniana Dall ; Miocene of Duplin County, North 



' Carolina ; Ion. 8.5 mm. ; p. 1446. 

 Fig. 23. Poromya jamaicensis Dall ; Oligocene of the Bowden, Jamaica, marl ; Ion. 5.5 



mm. ; p. 1509. 

 Fig. 24. Area (Acar) millifila Dall; Pliocene marl of Shell Creek, Florida; the liga- 

 ment is typical of Acar, the radial threads are minutely granular, especially 



on the posterior dorsal slope; the shell is thin and the scars obscure. 

 1629 



