THE ILLINOIAN ICE INVASION 



339 



CocUicopa lubrka (Muller) 



Vertigo tridentata Wolf 

 " elatior Sterki 



Pupilla muscorum (Linne) 

 " blandi Horse 



Leucochila jallax (Say) 



Bifidaria armifera (Say) 

 " contracta (Say) 



Succinea avara Say 

 " retusa Say 



COCHLICOPIDAE 



PUPILLrDAE 



Bifidaria hohingeri Sterki 

 corlkaria (Say) 

 " pentodon (Say) 

 Pupoides marginatus (Say) 

 Strobilops labyrinthica (Say) 

 " affinis Pilsbry 



SucaNxroAE 



Succinea ovalis Say 



grosienori Lea 



Endodontic ae 

 Spbyradium edentulum altkolalngeTsoll Pyramidula perspectha (Say) 

 Punclum pygntaeum (Draparnaud) alternata (Say) 



Helicodiscus parallelus (Say) solitaria (Say) 



Pyramidula cronkhitei anthonyiVWsbry Oreohelix iowcnsis (Pilsbry) 



Gaslrodonta ligera (Say) 

 Zoniloides arborea (Say) 



i»7«fa (Miiller) 

 Euconulus fiilvus (Muller) 



Circinaria cow.aw (Say) 



Zonitidae 



Vitrea hammonis (Strom.) 

 " indenlata (Say) 

 " wheatleyi (Bland) 

 Omphalina inornata (Say) 



ClRCINARIIDAE 



Helicidae 



Polygyra monodon (Rackett) 

 fraterna (Say) 

 " hirsuta (Say) 

 " mitchelliana (Lea) 

 " daitsa (Say) 

 " Ihyroides (Say) 



pennsylvanica (Green) 

 " elenata (Say) 

 " palliata (Say) 



Polygyra mullilineala (Say) 

 zatoa (Binney) 

 albolabris (Say) 

 " profunda (Say) 

 " inflecta (Say) 

 " stenotrema (Fer.) 

 " appressa (Say) 

 " tridentata (Say) 



Cypris species 



ARTEROPODA 

 CRUSTACEA 



Ostracod, species 

 INSECTA 



COLEOPTERA 

 Casabidae 

 Carabiis maeander sangamon Wickham PterostUhus fractus Scudder 



Elephrus irregularis Scudder 

 Lorkera glacialis Scudder 



destructus Scudder 

 gelidus Scudder 



