LA]\^D AND FRESH-WATER SHELLS OF KORTH AMERICA. 



III. 



SYSTEMATIC INDEX, 



Page 



AAIPIJLLARIID^. 1 



POmUS, HUMPHKEY. 3 



1. Pomus depressa, Say. 3 



TALVATID^. 8 



Talvata, 0. F. Mull. 8 



2. Valvata tricarinata, Say. 9 



3. Valvata sincera, Say. 12 



4. Valvata pupoidea, GId. 13 



5. Valvata humeralis, Say. 14 



6. Valvata virens, Tryon. 14 



TIVIPARID^. 16 



ViTipara, Lam. 16 



Vivipara intertexta, Say. 17 

 Vivipara subpurpurea, Say. 



19 

 Vivipara multicarinata,i7aZ(7 



22 

 Vivipara contectoides, 



W. G. B. 23 

 Vivipara georgiana, Lea. 27 

 Vivipara lineata, Val. 30 



13. Vivipara troostiana, LeA. 31 



14. Vivipara coosaensis, Lea. 32 



15. Vivipara inornata, W. G.B. 



113 



7. 



8. 



9. 



10. 



11. 

 12. 



16. 



21. 



22. 



Page 



Tiilotoma, Hald. 33 

 Tulotoma maguificum, Con. 

 33 



Melantho, Bowd. 35 

 Melantho ponderosa, Say. 3ij 

 Melantho decisa, Say. 41 

 Melantho coarctata, Lea. 52 

 Melantho decampi, Curr. 114 



L.iopla:x, Tropch. 55 

 Lioplax cyclostomati- 



formis, Lea. 56 



Lioplax subcarinata, Say. 58 



RISSOIDJC. 



65 



Bythinella, Moq.-Tand. 67 



23. By thinella attenuate, iJaW, 68 



24. Bythinella uickliniana, Lea. 



68 



25. Bythinella tenuipes, Coup. 69 



26. Bythinella binneyi, Tryon. 69 



27. Bythinella obtusa, Lea. 70 



Tryonia, Stimp. 70 



28. Tryonia clathrata, Stimp. 71 



29. Tryonia protea, GUI. 71 



(Yii) 



