[149] 



— 7, the last one slightly shouldered ; aperture narrow above, 

 much wider belosv, lip simple, acute, with a transverse lamina 

 within, columella with a prominent fold, parietal wall with two 

 teetli. Reddish-brown, with evanescent lighter bands, teeth 

 white. 



Length 11, diam. 5 mill. 



Florida (from West Indies). 



2. Tralia cingulata, Pfeiffer. 



Plate 18, figure 10. 



Fusiform, thick, polished, with microscopic revolving lines ; 

 spire elevated, convex-conic, apex acute, transparent ; whorls 10, 

 the last one not shouldered ; aperture very narrow, lip acute, 

 with 6 to 8 elongated laminae not quite reaching to the edge, 

 columella with a very prominent fold. Brown, with white re- 

 volving bands. 



Length 11, diam. 5 mill. 



Florida (from West Indies). 



3. Tralia Floridana, Shuttleworth. 



Plate 18, figure 11. 



Obconic, inflated, thin, smooth; spire conic, apex acute ; whorls 

 10, those of the spire radiately striate, body whorl obsoletely 

 angled above; aperture narrow, lip acute, with transverse lami- 

 nae within, columella with a strong fold, parietal wall with two 

 teeth. Gray, with chestnut bands. 



Length 7'5, diam. 4-5 mill. 



Florida Keys. 



LEUCONIA. 

 1. Leuconia Sayi, KUster. 



Plate 18, figure 12. 

 Ovate, thin, translucent, striate ; spire elevated conical, apex 



