THE NAUTILUS. 89 
7. Vitrea arborea Say. C, B, I, BR. 
8. Conulus fuluus Drap. Very plentiful at B and C under de- 
eaying 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 Auth. B,C, I, R. 
12a. Pyramidula striatella catskillensis Pils. Clearwater Lake. 
13. Pyramidula alternata Say. Under decaying logs at C, I, D. 
14. Helicodiscus lineatus Say. Very numerous and rather under- 
sized at C, D. 
15. Polygyra (Triodopsis) muiltilineata 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 (Stenotrema) hirsuta Say. D. 
18. Polygyra (Stenotrema) leai 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 contracta Say. B,C, D. 
24. Pupa holzingeri Sterki. C, D,I. 
25. Pupa curvidens Gld. C, D. 
26. Pupa corticaria Say. C, under bark of decaying log. 
27. Pupa armifera Say.. B, on sandy hillside; D. 
28. Pupa procera Gld. D. 
29. Vertigo ovata Say. B, C. 
30. Vertigo ventricosa Morse var. elatior Sterki. B. 
31. Vertigo tridentata Wolf (1 example, 4-dentate) D. 
32. Vertigo milium Gld. D. 
33. Suceinea ovalis Gld. C,B,R. Crawling on slough grass. 
34. Suecinea obliqua Say. I, very fine specimens among under- 
brush and weeds; C, E, on island in Mississippi River. 
35. Suecinea avara Say. I, very abundant under pine bark chips 
at water’s edge. 
36. Carychium exiquum Say. C, B. 
37. Carychium exiguum Say. var. R, C. 
