PLATE LIX. 



Fig. i. Actaon myakkanus Dall; Pliocene marl of Myakka River, Florida; alt. 8.0 



mm. ; Proc. U. S. Nat. Mus., xviii., p. 24, 1895. 



Fig. 2. Terebra chipolana Dall ; Chipola Oligocene ; alt. 12.0 mm. ; op. cit., p. 39, 1895. 

 Fig. 3. Actceon fusulus Dall; Chipola Oligocene; alt. 7.5 mm.; op. cit., p. 23, 1895. 

 Fig. 4. Atys obscurata Dall; Chipola Oligocene; alt. 4.0 mm.; op. cit., p. 30, 1895. 

 Fig. 5. Posterior and anterior plates of Chiton Burnsii Dall ; from Pliocene marl of 



Shell Creek, Florida; lat. of posterior valve 8.5, of anterior valve 7.7 mm. 

 Fig. 6. The same. 

 Fig. 7. Terebra (Oxymeris) dislocata Say var. indenta Dall; Miocene of Duplin 



County, North Carolina ; alt. 28.0 mm. ; Proc. U. S. N. Mus., xviii., p. 40, 



1895- 



Fig. 8. Tornatina incisula Dall ; Chipola Oligocene ; alt. 5.5 mm. ; op. cit., p. 25, 1895. 

 Fig. 9. Retusa chipolana Dall ; Chipola Oligocene ; alt. 5.5 mm. ; op. cit., p. 28, 1895. 

 Fig. 10. Scaphander Langdoni Dall ; Chipola Oligocene ; alt. 13.0 mm. ; op. cit., p. 28, 



1895- 



Fig. n. Actaon chipolanus Dall; Chipola Oligocene; alt. 6.3 mm.; op. cit., p. 23, 1895. 

 Fig. 12. Cylichnella Gabbi Dall ; Pliocene marl of the Caloosahatchie, Florida ; alt. 4.75 



mm. ; op. cit., p. 27, 1895. 

 Fig. 13. Terebra (Oxymeris) bipartita Sowerby var. spirifera Dall; Oligocene of St. 



Domingo ; alt. 30.0 mm. ; op. cit., p. 38, 1895. 

 Fig. 14. Atys (Acrostemma) salina Dall; Eocene of Louisiana; alt. 4.5 mm.; op. cit., 



p. 29, 1895. 

 Fig. 15. Atys (Acrostemma) gracilis Dall; Chipola Oligocene; alt. 5.0 mm.; op. cit., 



p. 29, 1895. 



Fig. 16. Haminea pompholyx Dall ; Chipola Oligocene ; alt. 6.5 mm. ; op. cit., p. 32, 1895. 

 Fig. 17. Retusa (Cylichnina) quercinensis Dall; Oak Grove sands; alt. 2.5 mm.; op. 



cit., p. 31, 1895. 

 Fig. 18. Tornatina myrmccoon Dall ; Miocene of Duplin County, North Carolina ; alt. 



6.0 mm. ; op. cit., p. 25, 1895. 

 Fig. 19. Terebra (Oxymeris) amitra Dall; Oligocene of St. Domingo; alt. 9.5 mm.; 



op. cit., p. 39, 1895. 

 Fig. 20. Retusa {Cylichnina) decapitata Dall; Chipola Oligocene; alt. 5.25 mm.; op. 



cit., p. 30, 1895. 



Fig. 21. Retusa (Cylichnina) duplinensis Dall; Miocene of Duplin County, North Caro- 

 lina; alt. 6.75 mm.; op. cit., p. .31, 1895. 



Fig. 22. Tornatina persimilis Dall ; Chipola Oligocene ; alt. 3.0 mm. ; op. cit., p. 26, 1895. 

 Fig. 23. Micromelo (Abderospira) chipolana Dall; Chipola Oligocene; alt. 4.5 mm.; 



op. cit., p. 32, 1895. 



Fig. 24. Atys oedemata Dall; Chipola Oligocene; alt. 4.5 mm.; op. cit., p. 28, 1895. 

 Fig. 25. Retusa (Cylichnina) microtrema Dall; Miocene of Duplin County, North 



Carolina; alt. 3.2 mm.; op. cit., p. 31, 1895. 

 Fig. 26. Turritella alcida Dall ; uppermost Oligocene of Oak Grove, Florida ; alt. 8.5 



mm. ; op. cit., p. 23, 1895. 

 Fig. 27. Terebra (Oxymeris) Langdoni Dall; Chipola Oligocene; alt. 20.0 mm.; op. 



cit., p. 39, 1895. 

 Fig. 28. Terebra (Oxymeris) bipartita Sowerby var. cirrus Dall; Oligocene of St. 



Domingo ; alt. 25.0 mm. ; op. cit., p. 38, 1895. 

 Fig. 29. Terebra (Oxymeris) bipartita Sowerby var. oligomitra Dall; Oligocene of St. 



Domingo ; alt. 38.0 mm. ; op. cit., p. 38, 1895. 

 Fig. 30. Terebra (Hastula) haitensis Dall; Oligocene of St. Domingo; alt. 62.0 mm.; 



op. cit., p. 35, 1895. 

 Fig. 31. Terebra Gabbi Dall, adolescent specimen, showing nepionic sculpture gradually 



becoming obsolete with the increasing rotundity of the whorls ; Oligocene 



of St. Domingo; alt. 70.0 mm.; op. cit., p. 34, 1895. This is T. robusta 



Gabb, 1873, not of Hinds, 1843. 



1632 



