PLATE LVII. 



Pitaria filosina Dall ; Miocene of Duplin County, North Carolina ; Ion. 7.75 



mm. ; p. 1270. 

 Transennella caloosana Dall; Pliocene marl of the Caloosahatchie, Florida; 



Ion. 13.5 mm. ; p. 1242. 



Macrocallista acuminata Dall ; Chipola Oligocene ; Ion. 28.0 mm. ; p. 1255. 

 Gemma magna Dall ; Miocene of Duplin County, North Carolina ; Ion. 7.0 



mm.; p. 1330. 



Gouldia a/to Dall ; Oak Grove sands ; Ion. 4.5 mm. ; p. 1249. 

 Transennella chipolana Dall ; Chipola Oligocene ; Ion. 5.0 mm. ; p. 1241. 

 Anomalocardia bowdeniana Dall; Oligocene marls of Bowden, Jamaica; Ion. 



4.5 mm.; p. 1304. 

 Gemma trigona Dall ; Miocene of Duplin County, North Carolina ; Ion. 4.25 



mm.; p. 1330. 

 Tivela jamaicensis Dall ; Oligocene marl of Bowden, Jamaica ; Ion. 6.0 mm. ; 



p. 1244. 



Gouldia erosa Dall ; Chipola Oligocene ; Ion. 8.3 mm. ; p. 1248. 

 Astarte opulentora Dall; Pliocene of Tehuantepec; Ion. n.o mm.; p. 1494. 

 Transennella utica Dall ; Chipola Oligocene ; Ion. 7.0 mm. ; p. 1240. 

 Transennella santarosana Dall; Oak Grove sands; Ion. 6.5 mm.; p. 1241. 

 Cytherea ucuttana Dall ; Red Bluff Eocene at Ucutta Creek ; Ion. 19.0 mm. ; 



p. 1276. 

 Periploma angulifera Philippi; Pliocene of Shell Creek, Florida; Ion. 21.0 mm.; 



p. 1529. 

 Cuspidaria (Bowdenia*)' distira Dall ; Oligocene marl of Bowden, Jamaica; Ion. 



3.0 mm. ; p. 1506. 

 Cuspidaria (Cardiomya) craspedonia Dall; Bowden marl; Ion. 4.0 mm.; p. 



1506. 



Pandora (Kennerleyia) lata Dall; Miocene, Maryland; Ion. 18.5 mm.; p. 1520. 

 Astarte distans var. ftoridana Dall ; Miocene of Alum Bluff, Florida ; Ion. 26.0 



mm.; p. 1493. 



Astarte Wagneri Dall ; Oak Grove sands ; Ion. 12.0 mm. ; p. 1488. 

 Lirodiscus Wailesii Dall ; Jacksonian; Ion. 18.0 mm. ; p. 1483. 

 Astarte parma Dall ; Miocene of Maryland ; Ion. 29.0 mm. ; p. 1493. 

 Anisodonta americana Dall ; Pliocene marl of Shell Creek, Florida ; Ion. 8.5 



mm.; p. 1133. 

 Lyonsia acuta Dall ; Pliocene marl of Shell Creek, Florida ; Ion. 7.5 mm. ; p. 



Fig. I. 

 Fig. 2. 



Fig. 3. 

 Fig. 4. 



Fig. 5. 

 Fig. 6. 

 Fig. 7. 



Fig. 8. 

 Fig. 9. 



Fig. 10. 



Fig. ii. 



Fig. 12. 



Fig. 13. 



Fig. 14. 



Fig. 15. 

 Fig. 16. 

 Fig. 17. 



Fig. 18. 

 Fig. 19. 



Fig. 20. 

 Fig. 21. 

 Fig. 22. 

 Fig. 23. 



Fig. 24. 



Fig. 25. Pandora (Kennerleyia) dodona Dall; Oak Grove sands, Florida; Ion. 12.0 



mm. ; p. 1518. 

 Fig. 26. Pandora (Kennerleyia} arctica Dall ; Pleistocene clays of Saco, Maine ; Ion, 



16.0 mm. ; p. 1520. 

 Fig. 27. Cyathodonta vicksburgiana Dall ; Vicksburg, Mississippi : Ion. 33.0 mm. ; p. 



1526. 

 Fig. 28. Spheniopsis americana Dall ; Oligocene of the Bowden, Jamaica, marl ; Ion. 



3.0 mm. ; p. 1508. 



Fig. 29. The same, internal view, showing hinge and pallial sinus. 

 Fig. 30. Pleurodesma iloridana Dall; Pliocene marls of Shell Creek, Florida; Ion. 14.5 



mm. 



1630 



