151 



28. Psidium — ? Grindstone creek. 



29. Gydas—? 



30. Daphnia—? 



31. Ammcola 2)orata, Say. Fort Bertliold, 



32. Ammcola lapidaria, Say. ' ' 



LAND SHELLS 



33. Helix minuscula, Binney. Council Bluffs, Nebraska Territory. 



34. Helix lineafa, Say. " " 



35. Helix striateUa, Anthony. Council Bluffs, Nebraska Territory. 



36. Helix in/lecta, Say. " ' " 



37. Helix Jiirsuta, ^ay. " " 



38. Helix solitaria, Say. " " 

 Sd. Helix alternafa, ^ay. " " 



40. Helix elevafa, Say. " " 



41. Helix/cdlax, Say. " ' " 



42. Helix concava, Say. " " 

 4:3. * Helix ligei'a, Say. " " 



44. Helix profunda, Say. Near Fort Leavenworth, Kansas Territory. 



45. Helix mult ilineata, Say. " " 



46. Helix monodon, Rackett. " " 



47. Helix imlchella, Mull. " " 



48. Helix costata, MuW. " " 



49. Helix arhorea, Say. Drift on the Missouri, near Fort Berthold. 



50. Helix cheresina, Say. " " 



51. Helix electrina, Gould. '• " 



52. Helix cooperi, (new spec.,) Binney. Black Hills, Nebraska Ter- 



ritory. 



53. Fupa nehraskana, (new spec.) W. G. Binney. Fort Berthold, 



Nebraska Territory. 



54. Pupahlandi, (new spec.,) AV. G. Binney. Fort Berthold. 



55. Pupa armigera, Say. " 



56. Pupa i^entodon, Say. Council Bluffs, Nebraska Territory. 



57. Pupa modesta, Say. " " 



58. Pupa hadia, A.<\.'Am'ti. " " 



59. Biilimus lubricus, Mull. Fort Berthold, on Missouri. 



60. Succinea venusta, Say. Yellowstone. 



61. Succinea retusa, Lea. " 



62. Succinea Hay deni, (new spec.,) W, G. Binney. Yellowstone. 



63. Succinea Uneata, (new spec.) W. G. Binney. Fort Union and 



Yellowstone. 



64. Succinea Nuttalliana, Lea. Fort Union. 



65. Succinea ohliqua, Say. Fort Berthold, Nebraska Territory. 



