POSTGLACIAL BIOTA OF THE GREAT LAKES REGION 



187 



ORDER TELEODESMACEA 

 Family Sphaerltdae 



Sphaerium simile (Say) = sulcatum (Lam.) 

 " striatinum (Lamarck) 

 " stamineum (Conrad) 

 " stamineum wisconsinensis Sterki 

 " acuminatum (Prime) 

 " solidulum (Prime) 

 " tofsum Sterki 

 " levissimiim Sterki 

 " flafum (Prime) 

 " emarginalum (Prime) 

 " rhomboideum (Prime) 

 " occidentale (Prime) 

 Musculium secure (Prime) 



transversum (Say) 

 truncatum (Linsley) 

 partumeium (Say) = orbicularis Barrett 

 rosaceum (Prime) 

 Pisidium abditum (Haldeman) 

 " adamsi (Prime) 

 " adamsi affine Sterki 

 " compressum (Prime) 

 " compressum confertum Sterki 

 " compressum laevigatum Sterki 

 " compressum illinoisense Sterki 

 " contortum (Prime) 

 " costatum Sterki 

 " idahoense Roper 



Pisidium fallax Sterki 

 " kirklandi Sterki 

 " mainense Sterki 

 " medianum Sterki 

 " medianum minutum Sterki 

 " milium (Haldeman) 

 " noveboracense (Prime) 

 " ohioense Sterki 

 " pauperculum Sterki 

 " politum Sterki 

 " politum decorum Sterki 

 " roperi Sterki 

 " rotundatum (Prime) 

 " sargenti Sterki 

 " scutellatum Sterki 



splendidulum Sterki 



superius Sterki 



tenuissimum Sterki 



tenuissimum calcareum Sterki 



trapezoideum Sterki 



triangulare Sterki 



idtra-montanum (Prime) 



variabile (Prime) 



ventricosum (Prime) 



ventricosum costatum Sterki 



" vesiculare Sterki? 

 " virginicum (Gmelin) 

 " walkeri Sterki 



Helicina ocadata (Lamarck) 



Pleurocera subulare (Lea) 

 elevatum (Say) 



CLASS GASTROPODA 



ORDER PROSOBRANCHIATA 



Family Helictwidae 



Family Pleurocerldae 



Goniobasis livescens (Menke) 

 depygis (Say) 

 Ihescens niagarensis (Lea) 

 kaldemani Tryon 



Family Amnicolldae 



Amnicola limosa (Say) 



limosa porata (Say) 

 limosa parva (Lea) 

 cincinnatiensis (Lea) = say ana Anth. 

 emarginata K.ustzx=obtusa Lea 

 lustrica Pilsbry 

 " letsoni Walker 



Amnicola walkeri Pilsbry 



" galbana (Say) 

 Paludestrina nickliniana (Lea) 

 Somatogyrus integer (Say) 



subglobosus (Say) 

 Pomatiopsis lapidaria (Say) 

 Pyrgulopsis scalariformis Wolf 



