PLATE XXXVI. 



Fig. I. Corbula (Bothrocorbula) radiatula Dall. outside of left valve; Ion. 12.5 nun. : 



p. 851. 



Fig. 2. The same, interior of left valve; Ion. 12.5 mm.; p. 851. 

 Fig. 3. The same, interior of right valve; Ion. 12.5 mm.; p. 851. 

 Fig. 4. Teredina bowdeniana Dall, left valve with portions of tube attached; Ion. 6.5 



mm. ; p. 822. 

 Fig. 5. Martesia (Asf>idof>holas) ovalis Say, with a portion (edges broken) of the 



enveloping protoplax ; Ion. 12 mm. ; p. 820. 



Fig. 6. Corbula (Aloidis) cxtcnuata Dall ; Ion. 7 mm. ; p. 844. 

 Fig. 7. Anisodonta anicricana Dall; from the Caloosahatchie Pliocene; Ion. 6 nun.: 



P. 1133- 



Fig. 8. Corbula (Cuncocorbula) scricca Dall; Ion. 5.5 mm.; p. 848. 



Fig. 9. Corbula (Bothrocorbula) Willcoxii Dall, interior of right valve, showing de- 

 pressed lunule ; Ion. 16.2 mm.; p. 851. 



Fig. 10. Corbula (Cuncocorbula) sfhenia Dall; Ion. 17.5 mm.; p. 847. 



Fig. II. Corbula (Cuncocorbula) scminella Dall; Ion. 4.7 mm.; p. 848. 



Fig. 12. Corbula (Bothrocorbula) synarmostcs Dall, exterior of left valve; Ion. 14 mm.; 

 p. 850. 



Fig. 13. The same, interior of right valve; Ion. 12.5 mm.; p. 850. 



Fig. 14. Corbula (Cuncocorbula) sarda Dall; Ion. 12 mm.; p. 847. 



Fig. 15. Corbula (Aloidis) hetcrogcnca Guppy, interior of right valve; Ion. 7.5 nun.; 

 p. 850. 



Fig. 16. Corbula (Aloidis) caloosa: Dall; Ion. 11.5 mm.; p. 853. 



Fig. 17. Corbula (Cuncocorbula) nucleata Dall; Ion. 5.15 mm.; p. 855. 



Fig. 18. Corbula (Cuncocorbula) IVhMcldi Dall; Ion. 6 mm.; p. 849. 



Fig. 19. Corbula (Aloidis) niilium Dall ; Ion. 2.7 mm. ; p. 845. 



Fig. 20. Crassatcllitcs clarkcnsis Dall; Eocene of Wahtubbee, Clarke County, Missis- 

 sippi ; dorsal view ; Ion. 29 mm. 



Fig. 21. The same, showing hinge of left valve; Ion. 23.5 mm. 



Fig. 22. Callista pittsburgcnsis Dall; Tejon Focene of Pittsburg, Oregon; Ion. 26 mm. 



Fig. 23. Scmclc carinata Conrad ; Oligocene of Oak Grove, Florida ; Ion. 16.5 mm. ; 

 p. 988. 



Fig. 24. Crassatcllitcs clarkcnsis Dall ; Eocene ; hinge of right valve ; Ion. of fragment 

 17 mm. 



Fig. 25. The same, side view of perfect right valve ; Ion. 43 mm. 



Fig. 26. Scmclc carinata Conrad, exterior of valve, figured above: Ion. 16.5 mm.; p. 988. 



I 192 



