96 Trans. Acad. Sci. of St. Louis. 



Jasper Co. (3), (2) ; Columbia, Boone Co. (10) ; 

 McAllister Springs, Saline Co. (1') ; Bear Creek, 

 Marion Co. (2) ; Galena, Stone Co. (1) ; Fern 

 Glen, St. Louis Co. (2) ; Seligman, Barry Co. 

 (Pils.); Chadwick, Christian Co. (Pils.) ; Bir- 

 mingham, Clay Co. (4) ; Rockville, Bates Co. 

 (Walker Coll.); Cureall Springs, Howell Co. 

 (Walker Coll.); Vineland, Jefferson Co. (Ba- 

 ker) ; Tuscumbia, Miller Co. (1) ; North Jeffer- 

 son, Calloway Co. (3). 



Postpliocene : — Lupus, Moniteau Co. (1); Prov- 

 idence, Boone Co. (12) ; Bluff City Landing 

 (Hambach). 



From the river bluffs at Boonville they are uniformly 

 small in size; from Boone county they are 20 to 26 mm. 

 in diameter, and from Scott county up to 27 mm. 



101. POLYGYEA CLAUSA Say. 



Barry Co. (3) ; Cassville, Barry Co. (5) ; Spring- 

 field, Greene Co. (2) ; Peirce City, Lawrence 

 Co. (10) ; Carthage, Jasper Co. (7) ; Douglas 

 Co. (2) ; Dade Co. (1) ; Pettis Co. (10) ; Kansas 

 City, Jackson Co. (4) ; Blue Lick, Saline Co. 

 (2) ; Jackson, Cape Girardeau Co. (1) ; Boon- 

 ville, Cooper Co. (3) ; Birmingham, Clay Co. 

 (13) ; Galena, Stone Co. (2) ; Fern Glen, St. 

 Louis Co. (3) ; Chadwick, Christian Co. (Pils. & 

 Fer.); St. Louis (Lind.); Arcadia, Iron Co. 

 (Baker) ; Callaway Co. (Greger) ; Dent Co. (7) ; 

 St. Charles Co. (1). 



Postpliocene : — Providence, Boone Co. (2) ; Near 

 mouth of Big Nemaha and Platte rivers (Ham- 

 bach). 



102. POLYGYRA LABROSA Bland. 



Macdonald Co. (6) ; Dade Co. (6) ; Carthage, 

 Jasper Co. (1); Camden Co. (2); Benton Co. 



