List of the Mollusca of Missouri. 95 



more than a half whorl beyond the later one. The Allan- 

 ville shells resemble the larger of those from Cape Girar- 

 deau, but are distinctly different, and of a deeper reddish 

 color. Pilsbry says he has seen some Arkansas and Ill- 

 inois specimens similar but not so dark. 



The postpliocene shells from Providence vary from 15 

 to 2iy 2 mm. diameter. 



98. POLYGYRA ELEVATA Say. 



Bear Creek, Marion Co. (8) ; Jefferson City, 

 Cole Co. (3) ; Barry Co. (1) ; Camden Co. (4) ; 

 Columbia, Boone Co. (6) ; Moniteau Co. (1) ; 

 Galena, Stone Co. (7) ; Fern Glen, St. Louis Co. 

 (2) ; Pettis Co. (Walker Coll.) ; Springfield, 

 Greene Co. (Walker Coll.) ; Callaway Co. (Greg- 

 er) ; St. Charles Co. (3) ; Missouri City, Clay 

 Co. (1). 



Postpliocene: — Lupus, Moniteau Co. (11) ; Prov- 

 idence, Boone Co. (15). 



99. Polygyea pennsylvanica Greene. 



Jackson, Cape Girardeau Co. (1) ; Fern Glen, 

 St. Louis Co. (1). 



Postpliocene: — Providence, Boone Co. (4). . 



The Fern Glen shell looks very much like a postplio- 

 cene fossil, but I think it is not such. 



100. POLYGYRA THYROIDES Say. 



Scott Co., upland, (1) ; Same, river bottom, (7) ; 

 Jackson, Cape Girardeau Co. (2) ; St. Francois 

 Co. (4) ; Marble Hill, Bollinger Co. (2) ; Poplar 

 Bluff, Butler Co. (4) ; New Madrid Co. (2) ; Van 

 Buren, Carter Co. (1) ; Camden Co. (3) ; Mor- 

 gan Co. (1) ; Moniteau Co. (6) ; Boonville, 

 Cooper Co. (11) ; Pettis Co. (10), (1) ; Carthage, 



