PLATE XLIV. 



Fig. i. Sportclla yorkensis Dall ; 7.0 mm. ; Miocene of Virginia ; 1x1130. t 



Fig. 2. Montacuta actinophora Dall; u.o mm.; Oligocene of Florida; p. 1172. 



Fig. 3. Erycina carolinensis Dall; 7.0 mm.; Miocene of North Carolina; p. 1145. 



Fig. 4. Montacuta chipolana Dall; 8.5 mm.; Oligocene of Florida; p. 1171. 



Fig. 5. Semelina cythereoidea Dali ; 5.0 mm. ; Oligocene of Florida ; p. 994. 



Fig. 6. Montacuta sagrinata Dall; 7.5 mm.; Miocene of Virginia; p. 11/4. 



Fig. 7. Erycina plicatula Dall ; 9.5 mm. ; Claibornian ; adult with feeble sculpture ; 



P. U43. 



Fig. 8. Aligena minor Dall; 3.0 mm.; Miocene of North Carolina; p. 1177. 

 Fig. 9. Sportella lubrica Dall ; 5.0111111.; Oligocene of Florida; p. 1127. 

 Fig. 10. Sportella pelex Dall ; 7.3 mm. ; Miocene of Virginia ; p. 1131. 

 Fig. ii. Diplodonta radiaia Dall, interior of left valve and profile of teeth; 19.0 mm.; 



Oligocene of Florida; p. 1184. 



Fig. 12. Erycina plicatula Dall; 6.0 mm.; young shell with strong sculpture; p. 1143. 

 Fig. 13. Sportella unicarinata Dall ; 5.5 mm. ; exterior of adolescent valve, showing 



carina and prominent prodissoconch ; Oligocene of Florida; p. 1127. 

 Fig. 14. Petricola calvertensis Dall; 17.5 mm.; Miocene of Maryland; p. 1060. 

 Fig. 15. Erycina chipolana Dall; 4.1 mm.; Oligocene of Florida; p. 1144. 

 Fig. 16. Diplodonta caloosaensis Dall; 27.0 mm.; Pliocene of Florida; p. 1188. 

 Fig. 17. Diplodonta (Felaniella) minor Dall, interior of right valve and profile of teeth; 



4.5 mm.; Oligocene of Bowden, Jamaica; p. 1183. 

 Fig. 18. Sportella obolus Dall, interior of right valve and profile of teeth ; 4.5 mm. ; 



Oligocene of Florida; p. 1126. 



Fig. 19. Diplodonta alta Dall; 27.0 mm.; Chipolan Oligocene; p. 1183. 

 Fig. 20. Donax chipolana Dall ; 9.5 mm. ; Chipolan Oligocene ; p. 966. 

 Fig. 21. Erycina (Pseudopvtliina) aincricana Dall; 16.0 mm.; Miocene of Maryland; 



p. 1146. 



Fig. 22. Erycina carolinensis Dall : 13.25111111.; Pliocene of South Carolina ; p. 1145. 

 Fig. 23. Aligena lineata Dall; 7.5 mm.; Oligocene of Oak Grove, Florida; p. 1176. 

 Fig. 24. Sportella lioconc/ia Dall ; 14.0111111.; Oligocene of Oak Grove, Florida ; p. 1128. 

 Fig. 25. Erycina (Pseudopylhina) aincricana Dall, 16.0 mm.; interior; Miocene of 

 Maryland; p. 1146. 



I2OO 



