10 



ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 304 



LOCALITIES 

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MOLLUSCAN 

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ALLOGONA PROFUNDA 























































AMNICOLA LEI6HT0NI 

















4 







































AMA . .' . '^TRICA 

















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AUG, 1NATA 























































1 KOCHI 























































M HYPNORUM 



















































V ' . t ANADt I '..' 









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:•■ . .1 ALTICOLA 





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-.) CONTRACTA 



















































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J PEN TO DON 

















































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GrRAULUS CRISTUS 













































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GYRAULUS PARVUS 



















































haplotrema concavum 





















































HAWAII A MINUSCULA 

















































HELICODISCUS PARALLELUS 



















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HELISOMA ANTROSA 





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HELISOMA TRIVOLVIS 















































HENDERSON! A OCCULTA 













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LYMNAEA OBRUSSA DECAMP/ 







































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LYMNAEA PALUSTRIS 









































li 







LYMNAEA PARVA 















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II 









MESODON CLAUSUS 













































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PISIDIUM COMPRESSUM 













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PISIDIUM CASERATANUM 

















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PISIDIUM VARIABILE 





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PISIDIUM NITIDUM 

















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PLANORBULA ARMIGEPA 















































POMATIOPSIS SCALARIS 















































PUNCTUM MINUTISSIMUM 













































PUPIL LA MUSCORUM 













































PUPOIDES ALBILABRlS 















































RETINl Q1NA 















































SPHAER v \TINUM 

















A 































STENOTREMA FRATERNUM 















































STENOTREMA HIRSUTUM 









































STENOTREMA LEA/ 



















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STROBILOPS LABYRINTHICA 









































SUCCINEA GELIDA 





























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SUCCINEA GROSVENORI 



























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SUCCINEA OVALIS 





































TRIO OOPS IS ALGONOUINENSIS 















































TRIODOPSIS FOSTER! 

















































TRIODOPSIS HUBRICHTI 

















































TRIODOPSIS MULTILINEATA 

















































TRIODOPSIS ALTONENSIS 



















































VALLONIA GRACILICOSTA 



















































VALLONIA PARVULA 





















































VALVATA SINCERA 















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VALVATA TRICARINATA 

















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VERTIGO ALPESTRIS OUGHTONI 



















































VERTIGO HUBRICHTI 

























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VERTIGO MILIUM 











































VERTIGO MODESTA 













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.' \ '.Vl't •■ ARBOREUS 











































Roxana silt 



A Farmdale silt 



Woodfordian terrace silt 



Fig. 2 - Chart showing localities from which Wisconsinan molluscan faunas were 

 cera from Peoria loess at locality 30; 2) Pisidium obtusnle from Lake Bloom- 



