74 



Lake Maxinkuckee, Physical and Biological Survey 



51. Muscidium ryckholti (Sterki) 



52. Musculi'um seciiris (Prime) 



53. Musculium transversum (Say) 



54. Musculium truncatum (Linsley) 



55. Pisidium maineiise Sterki 



56. Pisidium medianum Sterki 



57. Pisidium milium Haldeman 



58. Pisidium nove-boracense Prime 



59. Pisidium pauperculum Sterki 



60. Pisidium, paupercuhim crystalense Sterki 



61. Pisidium sargenti Sterki 



62. Pisidium scutellatimi 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 Ixvigatus Sterki 



71. Pisidium idahoense Sterki 



72. Pisidium, indianense Sterki 

 78. Pisidium lacustrinum Sterki 



74. Pisidium virginicum Bourginat 



75. Pisidium rotundatum Prime 



76. Pisidium variabile Prime 



77. Pisidium polituyn Sterki 



78. Pisidium vesicular e Sterki 



79. Pisidium subrotundatum Sterki 



80 

 81 

 82 

 83 

 84 

 85 

 86 

 87 

 88 

 89 

 90 

 91 



LAND MOLLUSKS 



Polygyra hirsuta (Say) 9 



Polygyra fraterna (Say) 



Polygyra monodori (Rackett) 



Polygyra thyr'oides (Say) * 



Polygyra thyroides bucculenta (Gould) 



Polygyi^a elevata (Say) 



Polygyra zaleta (Binney) 



Polygyra profunda (Say) 



Polygyra midtilineata (Say) 



Polygyra multilineata algonquinensis Nason 



Pyraynidula alternata (Say) 



Pyramidula cronkhitei anfhonyi Pilsbry & Ferriss 



