160 



CHECK LIST 



VALLONIIDAE 116 



Vallonia Risso 116 



Pulchella (Mullr.-) 118 



excenlrica Sterki 118 



coslata (Miiller) 119 



parvula Sterki 119 



COCHLICOPIDAE 120 



Cochlicopa (Ferussac) Risso 120 



liihrica (Muller) 120 



SUCCINEIDAE 121 



Succinea Draparnaud 121 



ovalis ovalis Say 122 



ovalis optima Pilsbry 122 



concordialis Gould 7. . . 123 



avara avara Say 124 



avara wardiana Lea 124 



relusa retiisa Lea 125 



retusa magister 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 



dor salts (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 



(Draparnaud) 140 



Opeas mauritianum (Pfeiflfer). . . 140 



Limax maximus Linnaeus 141 



Limax flavus Linnaeus 142 



Testacella europaea de Roissy. . . 142 



