68 AMERICAN JOURNAL 



CATALOGUE OF MOLLUSCA, COLLECTED BY PEOF. 

 D. S. SHELDON, AT DAVENPORT, IOWA. 



BY GEORGE W. TRYON, JR. 

 HELICID^. 



1. Hyalina arboeea, Say. 



2. '' ELECTRmA, Gould. 



3. " INDENTATA, Say. 



4. Mesomphix ligera, Say. 



5. Gastrodonta lineata, Say. 



6. Macrocyclis concava, Say. 



7. Patulaalternata, Say. 



8. " perspectiva, Say. 



9. ; " STRiATELLA, Anthony. 



10. Stenotrema hirsuta, Say. 



11. •' MONODON, Eackett. 



12. Triodopsis tridentata, Say. 



13. Mesodon albolabris, Say. 



14. " GLAUS A, Say. 



15. " MULTILINEATA, Say, 



16. " THYROiDES, Say. 



17. ." PROFUNDA, Say, 



18. Yallonia pulchella, Miill. 



19. Strobila labyrinthica, Say. 



20. Leucochila contracta, Say. 



21. SucciNEA obliqua, Say. 



22. " ovALis, Gould. 



LIMN^ID^. 



23. LlMN^A STAGNALIS, Linn. 



L. jugular is, Say. 



24. LiMNOPHYSA PALUSTRIS, Mull. 



L. umhrosa, Say. 



25. LiMNOPHYSA reflexa, Say. 



26. " ZEBRA, Tryon, Mss. 



27. Physa gyrina, Say. 



28. " HETEROSTROPHA, Say. 



29. BuLiNUS HYPNORUM, Linn. 



30. Planorbella campanulatus, Say. 



31. Helisoma bicarinatus, Say. 



32. " REGULARis, Lea, 



33. " TRivOLvis, Say. 



