170 



THE ILLINOIS GLACIAL LOBE. 



Lists of loess fossils — Uoiitinued. 



Xiimes heretofore < 



nonly used. 



List VI. From near Freeport, Strobilops virgo Pils 

 Illinois. (Collected by Oscar . Pupa eontracta Say. 

 Hershey, identified by W. H. Pupa cortiearia Say 



Dall.) 1. Teri'estrial species- 

 Continued. 



2. Fluviatile species (gill-bear- 

 ing univalves). 



3. Fluviatile bivalves (some oc- 

 casionally iu ponds). 



Pupa armifera Say 



Pupa holzingeri Sterki 



4. Pond species air-breathing 

 (some fluviatile). 



List VII. From Moliue, Illinois. 

 (Collected by J. A. Udden; 

 identified by C.T. Simpson.) 



Vertigo tridentata Wolf 



Succinea avara Say 



Carychium exiguum (Say) Gld ... 



Caryehiuni exile (?) Pils 



Pleurocera subulare (Lea) Try 



Campeloma decisa (Say) Call 



Bytbinella tenuipes (Coop.) Binn. 

 Amnicola cincinnatiensis Anth ... 



Amnicola porata (Say) Hald 



Somatogyrus depressus (Try.) Gill. 



Valvata tricarinata Say 



Pisidium compressum Prime 



Pisidium cruciatum Sterki 



Pisidium fallax Sterki 



Pisidium punctatum Sterki 



Pisidium variabile Prime 



Pisidium virgiuicum Gmel 



Pisidium walkeri Sterki 



Spbaerium stamineum (Con,) Prime 

 Spba>rium striatinum(Lam.) Prime 



Spboerium simile Say , 



Sphoerium solidulum Prime 



Planorbis parvus Say 



Planorbis bicarinatus Say 



Pbysa beterostropba Say 



Segmentina armigera (Say i Ad... 



Limnaea bumilis Say 



Ancylus tardus Say 



Ancylus rivularis Say 



Ancylus parallelus Hald 



Succinea avara Say 



Succinea luteola Gld 



Succinea obliqna Say 



Helicina occulta Say 



Patula striatella (Anth.) Horse; 

 also Pvramidula striatella. 



Strobilops virgo Pils. 

 Bifidaria coutracta (Say) Sterki. 

 Bifidaria cortiearia (Say ; Sterki . 

 Bifidaria armifera (Say) Sterki. 

 Bifidaria holzingeri (Sterki) 



Sterki. 

 Vertigo tridentata Wolf. 

 Succinea avara Say. 

 Carychium exiguum (Say) Gld. 

 Carychium exile Pils. 



Succinea avara Say. 

 Succinea luteola Gld. 

 Succinea obliqua Say. 

 Helicina occulta Say. 

 Pyramidula striatella (Anth.) 

 Pils. 



