THE NAUTILUS. 89 



7. Vitrea arborea Say. C, B, I, R. 



8. Conulus fulvus Drap. Very plentiful at B and C under de- 

 , cay ing logs. I, R. 



9. Strobilops virgo Pils. C, specimens perfectly colorless. D, R- 



10. Strobilops virgo Pils. (dark brown variety). At C, in com- 

 pany with, and at B, without typical specimens. 



11. Punctum pygmaeum Drap. C, B. 



12. Pyramidula striatella Anth. B, C, I, R. 



12. Pyramidula striatella catskillensis Pils. Cleanvater Lake. 



13. Pyramidula a/ternata Say. Under decaying logs at C, I, D. 



14. Uelicodixftii lineatus Say. Very numerous and rather under- 

 sized at C, D. 



15. Polygyra (Triodopgis) multilineata Say. I, E, island in 

 Mississippi River near Bellevue, la. At both stations mature shells 

 were very thin and delicate. 



16. Polygyra (Tridopsis) clausa Say. D. 



17. Polygyra (Stenolrema) hirsuta Say. D. 



18. Polygyra (Stenotrema) letii Ward. I, under drift ; E, bogs on 

 banks of creek ; B. 



19. Vallonia perspectiva Sterki. I and R. 



20. Ferussacia subcylindrica L. C, B, I, R. 



21. Pupa pentodon Say. B, D. 



22. Pupa edentula Drap. C. 



23. Pupa contraeta Say. B, C, D. 



24. Pupa holzingeri Sterki. C, D, I. 



25. Pupa curvidens (41(1. C, D. 



26. Pupa corticariaSay. C, under bark of decaying log. 



27. Pupa armlfera Say. B, on sandy hillside ; D. 



28. Pupa procera Gld. D. 



29. Vertigo ovata Say. B, C. 



30. Vertigo vent.ricosa Morse var. elatior Sterki. B. 



31. Vertigo tridentata Wolf (1 example, 4-dentate) D. 



32. Vertigo milium Gld. D. 



33. Succinea ovalis Gld. C, B, R. Crawling on slough grass. 



34. Succinea obliqi/a Say. I, very fine specimens among under- 

 brush and weeds ; C, E, on island in Mississippi River. 



35. Succinea avara Say. I, very abundant under pine bark chips 

 at water's edge. 



36. Carychium exiguum Say. C, B. 



37. Carychium exiguum Say. var. R, C. 



