aughey.] MOLLUSKS IN THE LACUSTRINE DEPOSITS. 267 



Hyalina arhorea Say, Douglas and Dakota Counties. 

 Hyalina viridula Monke, all Eastern Nebraska. 

 Hyalina indentata Say, Otoe and Douglas Counties. 

 Hyalina limatula Ward, Douglas County. 

 Hyalina minuscula Binney, all Eastern Nebraska. 

 Hyalina binneyana f Morse, Dixon and Cedar Counties. 

 Hyalina ferrea t Morse, Dixon County. 

 Hyalina exigua Stimpson, Dixon and Cedar Counties. 

 Hyalina intertexta f Binney, Douglas County. 

 Hyalina ligera Say, Otoe and Nemaha Counties. 

 Hyalina demissa f Binney, Nemaha and Richardson Counties. 

 Hyalina fulva Dreparnaud, Dixon and Cedar Counties. 

 Hyalina lasmodon Phillips, Nemaha and Otoe Counties. 

 Hyalina interna Say, Nemaha and Otoe Counties. 

 Hyalina signifieans Bland, Nemaha and Otoe Counties. 

 Hyalina lineata f Say, Douglas and Otoe Counties. 

 Macrocyclis concava Say, Douglas and Otoe Counties. 

 Helix solitaria Say, Otoe and Burt Counties. 

 Helix strigosa Gould, Otoe and Burt Counties. 

 Helix altemata Say, all Eastern Nebraska. 



Helix eumberlandiana Lea, Middle Lacustrine in Nemaha and Otoe 

 Counties. 

 Helix cooperi W. G. B., Douglas and Washington Counties. 

 Helix striatella Anthony, Dixon and Dakota Counties. 

 Helix labyrintMca Say, all Eastern Nebraska. 

 Helix hubbardi Brown, Middle Lacustrine in Nemaha County. 

 Helix auriformis Bland, Middle Lacustrine in Otoe County. 

 Helix tholus f W. G. Binney, Middle Lacustrine in Douglas County. 

 Helix fastigans L. W. Say, Middle Lacustrine in Otoe County. 

 Helix Jack&onii f Bland, Middle Lacustrine in Otoe County. 

 Helix liazardi f Bland, Middle Lacustrine in Douglas County. 

 Helix dorfeuilliana Lea, Middle Lacustrine in Cass County. 

 Helix pustula ?. Fer, Middle Lacustrine of Cass County. 

 Helix spinosa Lea, Middle Lacustrine of Harlan County. 

 Helix edgariana f Lea, Middle Lacustrine of Richardson County. 

 Helix stenotrema Fer, Otoe and Cass Counties. 

 Helix hirsuta Say, Dixon and Cass Counties. 

 Helix monodon Rackett, all Eastern Nebraska. 

 Helix palliata Say, all Eastern Nebraska. 

 Helix abstricta f Say, all Eastern Nebraska. 

 Helix appressa f Say, Otoe and Nemaha Counties. 

 . Helix infiecta Say, all Eastern Nebraska. 

 Helix tridentata ? all Eastern Nebraska. 



Helix fallax Say, all Eastern Nebraska and Republican Valley. 

 Helix albolabris Say, Eastern Nebraska and Republican Valley. 

 Helix multilineata Say, all Eastern Nebraska. 

 Helix pennsylvanica Green, Douglas County. 

 Helix elevata Say, Eastern Nebraska and Republican Valley. 

 Helix exoleta Binney, Eastern Nebraska and Republican Valley. 

 Helix roemeri Pfeifer, Middle Lacustrine of Richardson County. 

 Helix thyroides Say, Eastern Nebraska and Republican Valley. 

 Helix clausa Say, Eastern Nebraska. 

 Helix jejuna ? Say, Richardson County. 



Helix profunda Say, all Eastern Nebraska and Republican Valley. 

 Helix pulchella Mull., all Eastern Nebraska and Republican Valley. 

 Helix , Republican Valley 



