VIU 



SYSTEMATIC INDEX. 



28. 

 29. 

 30, 

 31. 



33. 

 34. 

 35. 

 3(i. 

 37. 

 38. 

 39. 

 40, 



Limneea caperata, Say. 5o 

 Limnaea vahlii, Bk. <j- AJo'll. 57 



58 



Limnsea pingelii, B<cL-. 

 Limnaea ■wormskioldii, 

 Morch, 

 Limnaea holbollii, Beck 

 ^ Moll. 

 Limnaea adelinae, Tri/on. 

 Limnaea vitrea, Ilakl. 

 Limnaea traskii, Tnjon. 

 Limnaea pallida, Ad. 

 Limnaea bulimoides, Lea. 61 

 Limnaea solida, Lea. 62 



Limnaea humilis, Saij. 63 

 Limnaea ferruginea, Hald. 67 



LepliJimnsea, Swains. 



41. Limnaea kirtlandiana, Lea 



42. Limnaea lanceata, Gld 



Acella, Hald. 



43. Limnaea gracilis, Jay. 



44. 



? berendti, P/r. To 



Poiiipliolyx, Lea. 73 



45. Pompholyx effusa, Lea. 74 



Carinifex, W. G. Binney. 74 



46. Carinifex ne-wberryi, iea. 74 



Pliysa, Drap. 75 

 Physa. 



47. Physa lordi, Baird. 77 



48. Physa gabbi, Tnjo7i. 77 



49. Physa gyrina, Say. 77 



50. Physa ampullacea, Gld. 79 



51. Physa sayii, Ta/ipan. 80 



52. Physa vinosa, G'Id. 80 



53. Physa ancillaria, Say. 81 



54. Physa osculans, Ilald. 82 



55. Physa mexicana, Phil. 83 



56. Physa heterostropha, jSay. 



84 



57. Physa fragilis. Migh. 89 

 5'^. Physa semiplicata, Kilst. 90 



59. Physd costata, Newc. 



60. Physa solida, Phil. 



61. Physa virginea, Gld. 



62. Physa humerosa, Gld. 



63. Physa pomilia, Conr. 



64. Physa virgata, Gld. 



65. Physa troostiana, Lea. 

 as. Physa triticea, Lea. 



67. Physa concolor, Hald. 



Physella, Hald. 



68. Physa globosa, Hald. 



Physodon, Hald. 



Blllinus, Adansox. 



Bulinus. 

 70. Bulinus aurantius, Cpr, 



97 



71. Bulinus nitens, Phil. 



72. Bulinus elatus, Gld. 



73. Bulinus hypuorum, Z 



74. Bulinus berlandierianus, 



]V. G.B. 101 and 155 



Isidora, Eh?. 101 



75. Bulinus integer, Hald. 101 



76. Bulinus distortus, Hald. 102 



PLANORBINiE. 



Plaiiorbis, Gdettard. 103 

 Planorhis. 



77. Planorbis subcrenatus, Cpr. 



103 

 Planorbis lentus. Say. 104 

 Planorbis tumidus, Pfr. 105 

 Planorbis glabratus, Say. 



106 

 Planorbis tumens, Cpr. 106 

 Planorbis havanensis, I^fr. 



"107 

 Planorbis liebmanni, jDA v. 



108 

 Plaiwrhclla, Hald. 109 



Planorbis caaipanulatus. 



Say. 109 



78. 

 79. 

 80. 



81, 



82. 



83. 



84. 



