88 THE NAUTILUS. 



1. Unio complanatus Sol. Outlet. 



2. Lampsilis luteolus Lam. Lake. 



3. Lampsilis iris Lea. Outlet. 



4. Alasmodonta rugosa Barnes. Outlet and Lake. 



5. Alasmodonta pressa Lea. Outlet, rare. 



6. Alasmodonta marginata. Say. Outlet. 



7. Anodonta grandis Say. Outlet. 



8. Anodonta excurvata De Kay. Inlet. 



9. Anodonta fragilis Lam. Inlet. 



10. Anodonta implicata Say. Lake. 



11. Anodonta footiana Lea. Outlet, rare. 



12. Anodonta salmonia Lea. Outlet. 



13. Anodonta simpsoniana Lea. Lake, rare. 



1 4. Anodonta lewisii Lea. Lake. 



15. Anodontoides subcylindraceus Lea. Outlet, rare. 

 1G. Anodontoides ferrussacianus Lea. Outlet, rare. 



17. Sphcerium striatinum Lam. Lake. 



18. Sphcerium rliomboideum Say. Lake. 



1 9. Sphcerium simile Say. Lake. 



20. Polygyra albolabris Say. Glens. 



20a. Polygyra albolabris var. dentata Walk. Glens, rare. 



21. Polygyra thyroidfs Say. Glens. 



22. Polygyra sayii Binn. Glens. 



23. Polygyra palliata Say. Glens. 



24. Polygyra appressa Say. Glens, rare. 



25. Polygyra 'fa/lax Say. Glens, rare. 



26. Polygyra tridentata Say. Glens. 



27. Polygyra monodon Rack. Glens, rare. 



28. Polygyra hirsuta Say. Glens, rare. 



29. Pyramidula allernata Say. Glens. 



30. Omphalina fuliginosa Griff. Glens. 



31. Omphalina inornata Say. Glens. 



32. Circinaria concava Say. Glens. 



33. Succinea obliqua Say. Glens. 



34. Gochlicopa lubrica Mull. Shores. 



35. Vallonia pulchella Mull. Shores. 



36. Lhnncza stagnalis Linn. Lake. 



37. Limncea emarginata Say. Lake. 



38. Limncsa palustris Mull. Lake, rare. 



