THE NAUTILUS. 17 



Lampsilis parvus (Barnes). Little Muddy, Beaucoup and 

 Locust creeks. 



Anodonta imbecilis Say. Creeks and ponds. 



Anodonta grandis ovata Lea. Creeks and ponds, plentiful. 



Anodonta grandis salmonia Lea. Beaucoup creek. 



Uniomerus tetralasmus (Say). Little Muddy and Beaucoup 

 creeks. 



Sphaerium sulcatum (Prime). Little Muddy and Puncheon 

 creeks. 



Sphaerium striatinum (Lam.). Little Muddy and Locust 

 creeks. 



Sphaerium stamineum (Conrad). Little Muddy and Locust 

 creeks. 



Sphaerium solidulum (Prime). Little Muddy and Beaucoup 

 creeks. 



Sphaerium occidentale (Prime). Little Muddy creek. 



Musculium transversum (Say). Little Muddy, Beaucoup 

 and Locust creeks. 



Musculium contractum (Prime). Little Muddy creek. 



Musculium truncatum (Linsley). Little Muddy creek. 



Musculium elevatum (Hald. ). Little Muddy and Beaucoup 

 creeks and pond on the Hinkley farm. Closed to Musculium 

 hodgsonii. 



Pisidium compressum Prime. Little Muddy creek, Sheller 

 lake and pond north of the R. R. bridge. 



Pisidium fallax Sterki. Little Muddy creek. 



Pisidium fraudulentum Sterki. R. R. reservoir. 



Pisidium illinoisensis Sterki. Reservoir and pond on the 

 Hinkley farm. 



Pisidium politum decorum Sterki. Pond north of the R. R. 

 bridge. 



Pisidium punctatum Sterki. Little Muddy and Puncheon 

 creeks. 



Pisidium punctatum inerme Sterki. Beaucoup creek. 



Pisidium sargenti Sterki. Puncheon creek. 



