Explanation of the Figures, 25 1 



Inbabits ? Mus. Tankerville. 



Shell nearly globose conical, white, with spiral rib striae, which 

 are crossed with slight concentric striae leaving scales on the spiral 

 ones, conical above, convex beneath, centre keeled, keel acute 

 squamulose. Peristome reflexed white, with a slight groove oppo- 

 site the keel, columella scarcely thickened, angular in front ; axis 

 f, diameter -| of an inch. 



3*. Helkina MaugericB. 



Testa depresso-ovata, carinata, albida, lutea unifasciata, supra in- 

 fraque conica convexa; peristomate subreflexo luteo, columella, 

 callosa lutea. 



Inhabits. ? Mus. Tankerville. 



Shell depressed ovate, keeled, white, with a broad band near 

 the central keel, leaving a white band near the suture, peristome 

 slightly reflexed, pale yellow, columella callous, gibbous, amber 

 yellow ; axis -^j diameter \ of an inch. 



T. vi. f. 1 . Helicina pulchella. 



2. neritella, and operculum. 



3. fasciata. 



4. substriata. 



5. —"— Braziliensi«. 



6. costata. 



7. viridis. 



8. aurantia. 



9. rhodostoma. 



10. major. 



1 ] . submarglnata. 



12. unifasciata. 



13. Brownii, and operculum. 



14. depressa. 



15. aureola. 



n 2 



