70 Trans. Acad. Sci. of St. Louis. 



6. Musculium teuncatum Lindsey. 



Pond, Flat Creek, Pettis Co. 



7. Musculium securis Prime. 



Flat Creek, Pettis Co. (or near). 



8. Musculium elevatum Hald. 



Coon Creek, Jasper Co.; Jackson, Cape Girar- 

 deau Co. ; Pond, Flat Creek, Pettis Co. 



pisidium Pfeifer. 



9. Pisidium compeessum Prime. 



Flat Creek, Pettis Co. 



10. Pisidium frakdulentum Sterki. 



Flat Creek, Pettis Co. 



11. Pisidium noveborensis Prime. 



Flat Creek, Pettis Co. (near). 



12. Pisidium neglectum Sterki. 



Branch of Muddy Creek, Pettis Co. 



GASTROPODA. 



Anisopleura. 



PROSOBRANCHIATA. 



Rhipidoglossa. 



Helicinid^. 

 helicina Lam. 



13. Helicina oebiculata Say. 



Stone Co. (Pilsbry) ; Marble Cave, Stone Co. 

 (Stearnes). 



Shimek says this is not found north of the south line 

 of Kentucky, either recent or fossil. 



