PLATE LVII. 



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



mm. ; p. 1270. 

 Fig. 2. Transennella caloosana Dall; Pliocene marl of the Caloosahatchie, Florida; 



Ion. 13.5 mm. ; p. 1242. 

 Fig. 3. Macrocallista acuminata Dall ; Chipola Oligocene ; Ion. 28.0 mm. ; p. 1255. 

 Fig. 4. Gemma magna Dall ; Miocene of Duplin County, North Carolina ; Ion. 7.0 



mm.; p. 1330. 

 Fig. S- Gouldia alta Dall ; Oak Grove sands ; Ion. 4.5 mm. ; p. 1249. 

 Fig. 6. Transennella chipolana Dall; Chipola Oligocene; Ion. 5.0 mm.; p. 1241. 

 Fig. 7. Anomalocardia bowdeniana Dall; Oligocene marls of Bowden, Jamaica; Ion. 



4.5 mm.; p. 1304. 

 Fig. 8. Gemma trigona Dall; Miocene of Duplin County, North Carolina; Ion. 4.25 



mm. ; p. 1330. 

 Fig. 9. Tivela jamaicensis Dall ; Oligocene marl of Bowden, Jamaica ; Ion. 6.0 mm. ; 



p. 1244. 

 Fig. 10. Gouldia erosa Dall; Chipola Oligocene; Ion. 8.3 mm.; p. 1248. 

 Fig. II. Astarte opulentora Dall; Pliocene of Tehuantepec; Ion. ii.o mm.; p. 1494. 

 Fig. 12. Transennella utica Dall ; Chipola Oligocene ; Ion. 7.0 mm. ; p. 1240. 

 Fig. 13. Transennella santarosana Dall; Oak Grove sands; Ion. 6.5 mm.; p. 1241. 

 Fig. 14. Cytherea ticttttana Dall ; Red Bluff Eocene at Ucutta Creek ; Ion. 19.0 mm. ; 



p. 1276. 

 Fig. 15. Periploma angulifera Philippi ; Pliocene of Shell Creek, Florida; Ion. 21.0 mm.; 



P- 1529- 

 Fig. 16. Cuspidaria (Bowdenia) distira Dall ; Oligocene marl of Bowden, Jamaica ; Ion. 



3.0 mm. ; p. 1506. 

 Fig. 17. Cuspidaria (Cardiomya) craspedonia Dall; Bowden marl; Ion. 4.0 mm.; p. 



1506. 

 Fig. 18. Pandora (Kennerleyia) lata Dall; Miocene, Maryland; Ion. 18.5 mm.; p. 1520. 

 Fig. ig. Astarte distans var. Horidana Dall; Miocene of Alum Bluff, Florida; Ion. 26.0 



mm.; p. 1493. 

 Fig. 20. Astarte Wagneri Dall; Oak Grove sands; Ion. 12.0 mm.; p. 1488. 

 Fig. 21. Lirodiscus Wailesii'Da.W; Jacksonian; Ion. 18.0 mm.; p. 1483. 

 Fig. 22. Astarte parma Dall ; Miocene of Maryland ; Ion. 29.0 mm. ; p. 1493. 

 Fig. 23. Anisodonta americana Dall; Pliocene marl of Shell Creek, Florida; Ion. 8.5 



mm.; p. 1133. 

 Fig. 24. Lyonsia acuta Dall ; Pliocene marl of Shell Creek, Florida ; Ion. 7.5 mm. ; p. 



1514- 

 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 vicksbiirgiana 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 Aoridana Dall ; Pliocene marls of Shell Creek, Florida ; Ion. 14.5 



mm. 



1630 



