List of the Mollusca of Missouri. 73 



23. Amnicola lapidaeia Say. 



Postpliocene : — Near St. Louis (Hambach). 



pomatiopsis Tryon. 



24. Pomatiopsis lapidaria Say. 



Camden Co. (1). 



In the collection of the Smithsonian Institution are 

 specimens from St. Louis, with a query as to whether 

 they were postpliocene. In Part II of the Land and 

 Fresh Water Shells Binney states that the species is 

 found from Missouri to Michigan. 



PLEUROCEEID.E. 



pleueoceea Rafmesque. 



25. Pleueoceea elevatum Say. 



Flat Creek, Barry Co. (6) ; Current River, Van 

 Buren, Carter Co. (9) ; Black River, Poplar 

 Bluffs, Butler Co. (13), South Missouri, (18); 

 Center Creek, Sarcoxie, Jasper Co. (15). 



26. Pleueocera elevatum lewisii Say. 



Spring, Howell Co. (10). 



27. Pleueoceea subulaee Lea. 



Niangua River, Hahatonka, Camden Co. (2) ; 

 James River, Galena, Stone Co. (2) ; Callaway 

 Co. (Greger). 



goniobasis Lea. 



28. Goniobasis plebeius Anth. 



Osage River, Cape Galena, Morgan Co. (12) ; 

 Coffin Spring Branch, Morgan Co. (26) ; Gra- 

 vois Creek, Morgan Co. (37) ; Branch Indian 

 Creek, Morgan Co. (30) ; Mineral Branch, Mor- 



