ILLINOIAN AND KANSAN MOLLUSCAN FAUNAS 



13 



Succinea grosvenori 







|X;X;X;X;XvXvX 







Triodopsis multilineata 

 Anguispira alternata 













X;X;X;X;X;X\vX 



Carychium canadense 













Cione 11a lubrica 













Columella alticola 













Discus cronkhitei 













Discus macclintocki 













Euconulus fulvus 









v!v!v!v!v!v!y!v 





Gastrocopta pentodon 













Gyraulus altissimus 













Gyraulus parvus 













Haplotrema concavum 













Hawaiia minuscula 













Helicodiscus parallelus 













Hendersonia occulta 













Lymnaea dalli 













Lymnaea parva 













Mesodon clausus 









•X-X\ - XvX-X\\v 





Pupil la muscorum 













Retinella electrina 













Stenotrema hirsutum 













Strobilops labyrinthica 













Succinea gelida 













Succinea ovalis 













Vallonia gracilicosta 









!■!•!■!•!■!•!•;■!•;•!■!•!■!•;•; 



:;xjx£x : :x":j:x':x': 



Valvata tricarinata 







;X;X;X;X;X;X;X;X 







Vertigo alpestris oughtoni 













Vertigo hubrichti 













Vertigo modes ta 













Zonitoides arboreus 

 Valvata sincera 

 Gastrocopta venusta 







: : : x : : : x : x : x : x : x : x 











Stenotrema monodon 













Striatura milium 













Strobilops af finis 













Succinea exile 













Vertigo elatior 













Vertigo hannai 













Vertigo morsei 

 Punctum parvula 















Stenotrema stenotrema 













Vertigo occulta 

 Deroceras cf. laeve 















Lymnaea humilis 













Vallonia albula 













Vertigo tridentata 











: 



Totalspecies 86 



56 



54 



52 



56 



45 



molluscan faunas in Illinois. 



