xxxii. 



Fig. i. Yoltiia fritter Dall ; Oligocene of Oak Grove, Florida; exterior of left valve; 



13.5 mm. ; p. 596. 

 Fig. 2. Lcda hypsoina Dall; Miocene, Duplin County, North Carolina; 5.5 mm.; 



p. 589. 



Fig. 3. Li'iia acala Dall ; Eocene of Wood's Bluff, Alabama ; 15.5 mm. ; p. 586. 

 Fig. 4. Leda trochilia Dall ; Miocene of Alum Bluff, Florida ; 9.5 mm. ; p. 590. 

 Fig. 5. Leila peltclla Dall ; Oligocene of Bowden, Jamaica ; 8 mm. ; p. 579. 

 Fig. 6. Lcda dodona Dall ; Oligocene of Oak Grove, Florida ; 9.2 mm. ; p. 589. 

 Fig. 7. Xuiitla sinaria Dall ; Oligocene of Oak Grove, Florida ; 4.5 mm. ; p. 575. 

 Fig. 8. Leila pharcida Dall ; Eocene of Wood's Bluff, Alabama ; 34 mm. ; p. 587. 

 Fig. 9. Niteula priinieola Dall; Miocene of Plum Point, Maryland; 6 mm. ; p. 576. 

 Fig. 10. Nucula ehipolana Dall; Oligocene of Chipola, Florida, marl ; 3.6 mm.; p. 575. 

 Fig. II. Area initiator Dall; Oligocene of Chipola, Florida, marl ; 5.5 mm. ; p. 634. 

 Fig. 12. Leda trochilia Dall ; Miocene of Alum Bluff, Florida ; 8.5 mm. ; p. 590. 

 Fig. 13. Lcda catasarcn Dall; Eocene of Wahtubbee Hills, Mississippi; 5.5 mm.; 



p. 588. 

 Fig. 14. Xiiiiila taphria Dall ; Miocene of Duplin County, North Carolina, Natural 



Well ; 3.8 mm. ; p. 576. 



Fig. 15. Area latidentata Dall ; Oligocene of the Chipola marl ; 18 mm. ; p. 638. 

 Fig. 1 6. Area Spcnecri Dall ; Pliocene of Tehuantepcc ; hinge of right valve ; 16 mm. ; 



p. 652. 



Fig. 17. Trinacria Meekii Dall ; Oligocene of Oak Grove, Florida ; 4 mm. ; p. 604. 

 Fig. 18. Area ovalina Dall ; Oligocene of Bowden, Jamaica ; 3.2 mm. ; p. 630. 

 Fig. 19. Area (Cucullaria) Aldrichi Dall ; Eocene of the Claiborne Sands ; 8.2 mm. ; 



p. 630. 



Fig. 20. Area eatasarea Dall , Pliocene of Alligator Creek, Florida; 55 mm. ; p. 654. 

 Fig. 21. Area eampsa Dall ; Miocene of Alum Bluff, Florida ; 41.5 mm. ; p. 656. 

 Fig. 22. Area campyla Dall, var. (cretea Dall; Pliocene of Shell Creek, Florida; 34 



mm. ; p. 645. 



Fig. 23. Area Virginia Wagner ; Miocene of Virginia ; 84 mm. ; p. 627. 

 Fig. 24. Area Spenceri Dall; Pliocene of Tehuantepec ; restored left valve; 18 mm. ; 



p. 652. 



927 



