OF THE UPPER MISSOURI. 
181 
23. Planorbis campanulatus, Say, 
24. Physa heterostropha, 
25. Physa Integra l Hald., 
26. Physa elongata, Say, 
27. Physa ampularia, Say, 
28. PSIDIUM— 1 
29. Cyolas— l 
30. Cyclas— i 
31. Amnicola porata, Say, 
32. Amnicola lapidaria, Say, 
LAND SHELLS. 
33. Helix minuscula, Binney, 
34. Helix lineata, Say, 
35. Helix striatella, Anthony, 
36. Helix inflecta, Say, 
37. Helix Hirsuta^ Say, 
38. Helix solitaria, Say, 
39. Helix alternata, Say, 
40. Helix eleyata, Say, 
41. Helix fallax, Say, 
42. Helix concava, Say, 
43. Helix ligera, Say, 
44. Helix profunda, Say, 
45. Helix multilineata, Say, 
46. Helix monodon, Rackett, 
47. Helix pulchella, Mull., 
48. Helix costata, Mull., 
49. Helix arborea, Say, 
50. Helix cheresina, Say, 
51. Helix electrina, Gould, 
52. Helix Gooperi, Binney, 
53. Pupa Nebraskana, W. G. Binney, 
54. Pupa Blandi, W. G. Binney, 
55. Pupa armigera, Say, 
56. Pupa pentodon, Say, 
57. Pupa modesta, Say, 
58. Pupa badia, Adams, 
Mouth of Big Sioux river. 
Grindstone creek. 
Fort Berthold. 
Council bluffs, Nebraska Territory. 
Near Fort Leavenworth, Kansas Territory. 
Drift on the Missouri near Fort Berthold. 
Black hills, Nebraska Territory. 
Fort Berthold, Nebraska Ter. 
Council bluffs, 
Botan ical 
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