[107] 

 23- Dsedalochila Postelliana, Bland. 



Plate 11, figures 10, 11, 12. 

 Spire slightly elevated, conical; whorls 5, ribbed -striate 

 above, finely striate below, periphery subangular ; aperture ear- 

 shaped, much contracted, the margins joined by a large lingui- 

 form parietal tooth entering the aperture, right margin with a 

 deep-seated lamella terminating below in a hook, basal margin 

 with a prominent oblique lamella extending to the edge of the 

 lip. Brownish horn-color, thin, pellucid, aperture white. 



Diam. 9-5, alt. 5 mill. 



Georgia. 



24. Dsedalochila auriculata, Say. 



Plate 11, figures 13, 14. 



Spire low, conical ; whorls 5, ribbed-striate above and below, 

 the periphery slightly angulate ; last whorl suddenly deflected 

 to the aperture, and very strongly scrobiculate behind the middle 

 of the right margin, and also at the base ; aperture oblique, 

 auriform, the parietal tooth large, irregular, projecting inwards 

 and upwards, the right margin with a perpendicular lamellar 

 tooth, and the base twisted into a large oblique tooth ; base 

 showing 1| whorls, the umbilical region bounded by a carina. 



Diam. 13, height 7-5 mill. 



St. Augustine, Florida. 



Larger than the other species, and distinguished by the ribs 

 on the base. 



25. DsedalocMla uvulifera, Shuttleworth. 



Plate 11, figures 15, 16. 



Spire depressed conical ; whorls 5, with close ribs extending 

 entirely across the base ; periphery subangulate, lower surface 

 convex ; last whorl deflected at the aperture and scrobiculate ; 

 aperture oblique, much contracted by teeth, with the lip very 

 much expanded, parietal tooth quadrately linguiform, extending 

 into the aperture, the upper lip tooth situated far within the 

 aperture, the basal lip tooth an oblique plication ; umbilical re- 

 gion subcarinate. Horn color. 



Diam. 12, alt. 7 mill. 



Florida ; Corpus Christi, Texas. 



rmed aperture from B. auriculata. 



