[153] 

 3. Helicina Hanleyana, PfeifFer. 



Plate 18, figures 22, 23. 



Subglobose, rather solid, with somewhat distant concentric im- 

 pressed lines ; spire convexly conic, suture impressed ; whorls 

 5, convex, the last well rounded ; aperture semi-circular, lip a 

 little expanded, thickened within. Reddish-brown, shining. 



Height 5"6, diam. 7'5 mill. 



Near New Orleans. 



4. Helicina chrysocheila, Binney. 



Plate 18, figure 24. 



Elevated conical, or pyramidal, thin, shining, surface very 

 finely punctured ; wliorls 5, convex, indistinctly angular at 

 periphery, and the base somewhat flattened; aperture large, sub- 

 oval, lip refleqted. Flesh color or yellowish, interior of shell, 

 lip and callus polished, deep golden color. 



Height 8-3, dianr. 10 mill. 



Texas and Mexico. 



5. Helicina subglobulosa, Poey. 



Plate 18, figure 25. 



Globosely conical, solid, lightly striate ; whorls six, the last 

 subangulate, base convex ; aperture broadly semioval, lip wide, 

 white, unicolor, or with two red bands, a broad one at the suture 

 and a narrower one at the periphery. 



Height 7, diam. 10 mill. 



Florida, (from Cuba) at Key Biscayne ; it is not known whether 

 it was accidentally introduced, or is a permanent resident. 



Family TRUNCATELLID^. 



Shell, cylindrical or pupoid, with small oval aperture and thin 

 spiral operculum. Whorls transversely ribbed. 



Animal mih. eyes at the rear of the base of the two contractile 

 tentacles. Unisexual. 



21 



