474 PROCEEDINGS OF THE ACADEMY OF [1896. 



spaces, strong from lower suture to greatest diameter of shell, and 

 from there decreasing rapidly in size and vanishing before reaching 

 the suture above ; strong spiral strise about S- on each whorl, with an 

 equal number of finer alternate lines ; columella sharply bent as in 

 Strepsidura. 



Locality, Jackson, Miss. 



Amauropsis jacksonensis n. sp. PL XIX, fig. 3. 



Specific characterization. — Size and general form as shown by the 

 figure ; whorls 10, the upper 4 to 5 small, the other increasing in 

 size rapidly and becoming shouldered ; body whorl large, shouldered ; 

 umbilicus none or entirely hidden by a labial callosity. This differs 

 from A. perovata Con. by its greater height, the well-defined shoulder 

 on each whorl, and the absence of an umbilicus. 



Locality, Jackson, Miss. 



Cypraea pinguis Con. PI. XIX, figs. 4, 4a. 



The specimen herewith figured shows a few spiral whorls. Gener- 

 ally, however, they are covered over. 

 Locality, Jackson, Miss. 



Cypraea dalli Aid. PI. XIX, figs. 5a, 6a. 



This was originally described from the Red Bluff horizon of Mis- 

 sissippi, yet it is quite abundant, and shows many varietal forms 

 at Jackson, Miss. 



Locality, Jackson, Miss. 



CLAIBORNE STAGE. 



Papillina staminea Con. var. PI. XX, figs. 1, 2, .3, 4. 



F7^sus siaminetts Con., Foss. Shells Tert. Form., 1833, p, 43, pi. 18, fig. 

 14, of 2d ed., 1835. 



There is great confusion among the Claiborne species of Fxmi8 

 and its allies, and here is a most typical example. Papillina stomi- 

 ?iea is quite fulgurate in appearance, having a row of compressed 

 tubercles on the carina and a long beak. The specimens herewith 

 figured show how greatly these features vary. These specimens 

 have some parts in common with F. irrasus Cob., and we are inclined 

 to think all will prove to be one and the same species. The apices 

 of this and related species are smooth and blunt. 



Locality, Claiborne, Ala. 



