OF CONCHOLOGY. 291 



smooth, straight; outer lip smooth within; canal slightly pro- 

 duced and recurved ; white, base and apex rose color. 



So far as I am aware, the only species heretofore known is the 

 one on which the genus was founded, F. carmata, Rve. The 

 above corresponds to and confirms the generic characters estab- 

 lished by Mr. Reeve. 



The peculiar sculpture and color of this species separates it 

 distinctly from any other genus of Cerithiidoe. 



Odostomia striata, Pease. Plate 24, fig. 16. 



Dei<cription. — T. elongata, cylindraceo-turrita, subpellucida, 

 transversim conferte et tenui striata ; anfr. 7, plano-convexis, 

 ad suturam vix angulata ; sutura bene impressa ; apertura parva, 

 ovata ; alba, spira interdura flavescente aut pallide castanea. 



Dimensions. — Long. 5|, diam. 1^ mill. 



Locality. — Paumotus. 



Shell elongate, cylindrically turrited, subpellucid ; whorls 

 seven, planely convex, transversely closely and finely striated, 

 slightly angulate at the suture ; suture well impressed ; aperture 

 small ovate ; columella fold distinct ; white, spire sometimes 

 yellowish or light chestnut brown. 



Odostomia polita. Pease. Plate 21, fig. 17. 



Description. — T. elongata, cylindracea, laevigata, glabra, albida 

 aut flavescente ; anfr. 8, planis ; sutura subimpressa ; apertura 

 parva, oblongo-ovata, plica magna ; columella callosa. 



Dimensions. — Long. 6, diam. 2 mill. 



Locality. — Tahiti. 



Shell elongate, cylindrical, smooth, glabrous, whitish or 

 yellowish; whorls eight, plane, suture slightly impressed ; aper- 

 ture small, oblong ovate ; columella fold well developed ; colu- 

 mella callous. 



Odostomia rubra, Pease. Plate 21, fig. 18. 



Description. — T. elongata, cylindracea, rosacea, longitudinaliter 

 striata, transversim obsolete striata ; anfr. 9-10, planis, ad sutu- 

 ram marginatis ; apertura oblongo-ovata ; columella vix callosa. 



Dimensions. — Long. 10, diam. 2 mill. 



Localitij. — Paumotus. 



Shell elongate, cylindrical, light rose color, longitudinally 

 striate, and indistinctly striate transversely ; whorls 9-10, 



