468 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



HELICID.33. 



Helix alternata, Say. 

 albolabris, Say. 

 albolabris, var.? 

 concava, Say. 

 costata, Miill. 

 chersina, Say. 

 cooperi, W. G. B. 

 elevata, Say. 

 electrina, Gould, 

 fuliginosa, Binn. 

 fallax, Say. 

 haydeni, W. G. B. 

 hirsuta, Say. 

 inflecta, Say. 

 indentata, Say. 

 ligera, Say. 

 lineata, Say. 

 minuscula, Binn. 

 minuta, Say. 

 monodon, Back, 

 multilineata, Say. 

 profunda, Say. 



LAND SHELLS. 



Helicid^ — Continued. 



Helix solitaria, Say. 



striatella, Anth. 

 thyroides, Say. 

 tridentata, Say. 



PTTPAD^E. 



Pupa armifera, Say. 



badia, Adams. 



blandi, W. G. B. 



modesta, Say. 



pentodon, Say. 

 Zua subcylindracea, Chem. 



STJCCINID^E. 



Succinea avara, Say. 



haydeni, W. G. B. 

 lineata, W. G. B. 

 nuttalliana, ? Lea. 

 obliqua, Say. 

 vermeta, Say. 



VIVIPARITY. 



Melantho integra, Say. 



AMNICOLLD^. 



Aninicola porata, Say. 



cincinnatiensis, Anth. 

 Pomatiopsis lapidaria, Say. 



LYTVLN^AD^E. 



Lymnea desidiosa, Say. 

 elodes, Say. 

 haydeni, Lea. 

 huuiilis, Lea. 

 kirtlandiana, Lea. 

 palustris, Miill. 



FRESH- WATER SHELLS. 

 Univalves. 



Lymn^ad^ — Continued. 



Lymnea reflexa, Say. 

 umbrosa, Say. 



PHYSAD^E. 



Physa heterostropha, Say. 

 Bulinus bypnorum, Linn. 



planorbid^:. 



Planorbis bicarinatus, Say. 

 trivolvis, Say, 

 companulatus, Say. 

 parvus, Say. 

 lentus, Say. 



