PLATE XXXI. 



Fig. I. Area (Scapharca) dodona Dall ; Oak Grove marl; umbonal view; Ion. 40 



mm. ; p. 640. 

 Fig. 2. Area (Scapharca) santarosana Dall ; Oak Grove marl ; umbonal view ; Ion. 



37 mm. ; p. 641. 

 Fig. 3. Area (Scapharca) campyla Dall ; Caloosahatchie beds ; side view ; Ion. 37 



mm. ; p. 644. 

 Fig. 4. Area (Scapharca) campyla Dall, umbonal view, showing tortuosity of the valves ; 



Ion. 37 mm. ; p. 644. 



Fig. 5. Area (A nadara) alciina Dall ; Caloosahatchie beds ; Ion. 30111111.; p. 635.- 

 Fig. 6. Area (Anadara) rustica Tuomey and Holmes; Caloosahatchie beds; Ion. 54 



mm. ; p. 653. 

 Fig. 7. Area (Anadara) aleima Dall ; Caloosahatchie beds ; view of interior of left 



valve; Ion. 30 mm. ; p. 635. 

 Fig. 8. Area (Scapharca) dodona Dall ; Oak Grove marl ; profile view of left valve ; 



Ion. 40 mm. ; p. 640. 



Fig. 8 a. Enlarged view of posterior rib sculpture of the same ; p. 640. 

 Fig. 9. Area (Anadara) rustica Tuomey and Holmes, umbonal view ; Ion. 54 mm. ; 



P- 653- 

 Fig. 10. Area (Scapharca) santarosana Dall ; Oak Grove marl ; profile view of left valve ; 



Ion. 37 mm. ; p. 641. 



Fig. n. Area (Scapharca) stamina/a Dall ; Chipola marl ; Ion. 27 mm. ; p. 641. 

 Fig. 12. Area aquila Heilprin ; Caloosahatchie beds ; Ion. 33.5111111.; p. 621. 

 Fig. 13. Area (Scapharca) staminata Dall; Miocene, Walton County, Florida; Ion. 37 



mm. ; p. 641. 

 Fig. 14. Area (Noetia) litnula Conrad; Caloosahatchie beds; umbonal view; Ion. 60 



mm. ; p. 631. 

 Fig. 14 b. Area (Noefia) limula Conrad, profile view of left valve ; Ion. 60 mm. ; p. 631. 



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