AUGiiET.] MOLLUSKS IN THE LACUSTRINE DEPOSITS. '267 



Syalina arhorea Say, Douglas aud Dakota Counties. 

 Hyalina viridula Monke, all Eastern Nebraska. 

 Eyalina indcntata Say, Otoe and Douglas Counties. 

 Hyalina limatula Ward, Douglas County. 

 Hyalina minuscula Binney, all Eastern Nebraska. 

 Hyalina hinneyana f Morse, Dixon and Cedar Counties. 

 Hyalina ferrea f 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 Eichardson Counties. 

 Hyalina fulva Dreparnaud, Dixon and Cedar Counties. 

 Hyaliyia lasmodon Phillips, Nemaha and Otoe Counties. 

 Hyalina interna Say, Nemaha and Otoe Counties. 

 Hyalina signijicans Bland, Nemaha and Otoe Counties. 

 Hyalina lineata f Say, Douglas and Otoe Counties. 

 Macj'ocyclis concava Say, Douglas and Oto.e Counties. 

 Helix solitaria Say, Otoe and Burt Counties. 

 Helix strigosa Gould, Otoe and Burt Counties. 

 Helix alternata Say, all Eastern Nebraska. 



Helix cumherlandiana Lea, Middle Lacustrine in Nemaha and Otoe 

 Counties. 

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

 Helix striafella Anthony, Dixon and Dakota Counties. 

 Helix lahyrintMca Say, all Eastern Nebraska. 

 Helix hubbardi Brown, Middle Lacustrine in Nemaha County. 

 Helix aurifonnis Bland, Middle Lacustrine in Otoe County. 

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

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

 Helix Jacksonii f Bland, Middle Lacustrine in Otoe County. 

 Helix hazardi f Bland, Middle Lacustrine in Douglas County. 

 Helix dorfeuilliana Lea, Middle Lacustrine in Cass County. 

 Helix 2nistula f Fer, Middle hacnstrme 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 injiecta Say, all Eastern Nebraska. 

 Helix tridentata f 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 B'muey, Eastern Nebraska and Republican Valley. 

 Helix roemeri Pleifer, Middle Lacustrine of Richardson County. 

 Helix thyroides Say, Eastern Nebraska and Republican Valley. 

 Helix clausa Say, Eastern Nebraska. 

 Helix jejuna f Say, Richardson County. 



Helix profunda Say, all Eastern Nebraska and Republican Valley. 

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

 Helix , Republican Valley 



