74 Lake Maxinkuckee, Physical and Biological Survey 



51. Musculium ryckholti (Sterki) 



52. Musculium securis (Prime) 



53. Musculium transversum (Say) 



54. Musculium truncatum (Linsley) 



55. Pisidium mainense Sterki 



56. Pisidium medianum Sterki 



57. Pisidium milium Haldeman 



58. Pisidium nove-boracense Prime 



59. Pisidium pauperculum Sterki 



60. Pisidium pauperculum crystalense Sterki 



61. Pisidium sargenti Sterki 



62. Pisidium scutellatum Sterki 



63. Pisidium splendidulum Sterki 



64. Pisidium strengii Sterki 



65. Pisidium tenuissimum Sterki 



66. Pisidium walkeri Sterki 



67. Pisidium abditum Haldeman 



68. Pisidium affine Sterki 



69. Pisidium compressum Prime 



70. Pisidium compressum Isevigatus Sterki 



71. Pisidium idahoense Sterki 



72. Pisidium, indianense Sterki 



73. Pisidium lacustrinum Sterki 



74. Pisidium virginicum Bourginat 



75. Pisidium rotundatum Prime 



76. Pisidium variabile Prime 



77. Pisidium politum Sterki 



78. Pisidium vesiculare Sterki 



79. Pisidium subrotundatum Sterki 



LAND MOLLUSKS 



80. Polygyra hirsuta (Say) 



81. Polygyra fraterna (Say) 



82. Poly gyro, monodon (Rackett) 



83. Polygyra thyroides (Say) 



84. Polygyra thyroides bucculenta^ (Gould) 



85. Polygyra elevata (Say) 



86. Polygyra zaleta (Binney) 



87. Polygyra profunda (Say) 



88. Polygyra multilineata (Say) 



89. Polygyra multilineata algonquinensis Nason 



90. Pyramidula alternata (Say) 



91. Pyramidula cronkhitei anthonyi Pilsbry & Ferriss 



