100 Trans. Acad. Sci. of St. Louis. 



Macdonald Co. (10) ; Springfield, Greene Co. 

 (Pils. & Fer.); Cliadwick, Christian Co. (P. & 

 F.) ; Current river, Co. not given, (P. & F.) ; 

 Seligman, Barry Co. (Pils.) ; Arcadia, Iron Co. 

 (Baker). 



These different lots vary somewhat in the distinctness 

 of sculpture on the under side, in the size and position of 

 the upper lip tooth, and in the flatness of the vault, but 

 apparently not uniformly so or distinct enough to de- 

 serve a varietal name. 



113. PoLYGYRA jACKSONi Bland. 



Camden Co. (10); Dade Co. (10); Barry Co. 

 (13) ; Ash Grove, Greene Co. (12) ; Grand Falls, 

 Jasper Co. (1) ; Split Log, Macdonald Co. (1) ; 

 Cassville, Barry Co. (1) ; Springfield, Greene 

 Co. (P. & F.). 



114. PoLYGYRA TRIODONTOIDES Bland. 



Monett, Barry Co. (2). 



BULIMULID^. 



BULiMULus Leach. 



115. BuLIMULUS DEALBATUS OZARKENSIS Pils. & Fcr. 



Cooper Co. (8) ; Camden Co. (5) ; Barry Co. (2) ; 

 Macdonald Co. (5) ; Douglas Co. (2) ; River- 

 mines, St. Francois Co. (1); Oakwood, Marion 

 Co. (2); Callaway Co. (Greger) ; Cass Co. (8). 



Stearns reported B. dealbatus from Stone count3\ 

 When I found this shell in Cooper county I thought that 

 this was the most northern point in the State where it 

 would be founds and I vras much surprised aftervrards to 

 find it near Hannibal. 



