60 



CHECK LIST 



ALLONIIDAE 116 



\'allonia Risso 116 



pulchella (MuUer) 118 



excentrica Sterki 118 



costata (Muller) 119 



parvula Sterki 119 



OCHLICOPIDAE 120 



Cochlicopa (Ferussac) Risso 120 



lubrica (Muller) 120 



UCCINEIDAE 121 



Succinea Drapamaud 121 



ovalis ovalis Say 122 



malis optima Pilsbry 122 



concordialis Gould 123 



avara avara Say 124 



avara wardiana Lea 124 



retusa retusa Lea 125 



retusa magisler Pilsbry 125 



retusa decampi Tryon 126 



retusa illinoisensis Wolf 126 



retusa peoriensis Wolf 126 



salleana Pfeiffer 127 



LIMACIDAE 128 



Deroceras Rafinesque 128 



gracile Rafinesque 129 



agreste (Linnaeus) 130 



PHILOMYCIDAE 131 



Philomycus Rafinesque 131 



carolinianus (Bosc) 131 



Pallifera Morse 132 



dorsalis (Binney) 132 



fosteri F. C. Baker. New 



Species 133 



ELLOBIIDAE 135 



Carychium Muller 135 



exiguum (Say) 136 



exile H. C. Lea 136 



SPECIES INTRODUCED 



Oxychilus cellarium (Muller). ... 139 

 Oxychilus lucidum 



(Drapamaud) 140 



Opeas mauritianum (Pfeiflfer) . . . 140 



Limax maximus Linnaeus 141 



Limax flavus Linnaeus 142 



Testacella europaea de Roissy. . . 142 



