114 JOURNAL AND PROCEEDINGS 



FRESPI WATER MOLLUSCA. 



47. Carychium exigium, Say. Common. 



48. " " " Var. Exilis Lea. Common. 



49. Limngea stagnalis, Linn. Common. 



50. " palustris, Miill. Common. 



51. " humilis, Say. Common. 



52. " desidiosa, Say. Common. 



53. " caperata, Say. Not common. 



54. " gracilis, Jay. Rare. 



55. Physa gyrina, Say. Common. 



56. " heterostrophia, Say. Common. 



57. Bulinus hypnorum, Linn. Common. 



58. Planorbis campanulatus, Say. Common. 



59. " trivolvis, Say. Common. 



60. " bicarinatus, Say. Common. 



61. " albus, Say. 



62. " deflectus, Say. 



63. " exactus. 



64. " parvus, Say. 



65. " nautileus, Linn. Rare. 



66. " armigerus. Say. 



67. Ancylus rivularis, Say. Rather rare. 



68. Valvata tricarinata, Say. Common. 



69. " sincere, Say. Common. 



70. Melantho decisus, Say. Common. 



71. Amnicola limosa. Say. 



72. " " var. pallida, 



73. " Cincinnatiensis. 

 74.- " sp. 



75. Pomatiopsis Lapidaria, Say. Rather common. 



76. Pleurocera Subulare, Lea. Common. 



77. Goniobasis livescens, Menke. Common. 



78. Sphserium Sulcatum, Lam. Common. 



79. " rhomboideum, Say. Rare, 



80. " truncatum, Linsley. Rare. 



81. " partumeium. Say. Not common. 



82. " stramineum. Common. 



83. " occidentale. Common. 



84. Pisidium abditium, Prime. , 



