2'82 AMERICAN JOURNAL 



Shell somewhat fusiform, truncate at base, smooth, white ; 

 whorls four, marginated and slightly angulate at sutures ; spire 

 somewhat produced ; outer lip simple, smooth within ; aperture 

 wide ; columella slightly curved and c-allous. 



The generic characters of the above are doubtful. It may 

 prove the type of a new genus. If correct, it is the first species 

 of Olivella described from Polynesia. 



Narica delicata, Pease. Plate 23, fig. 25. 



Description. — T. ventricoso-globosa, tenui, fragilis, alba, apice 

 roseo ; transversim costis ligata, costis parvis, confertis, promi- 

 nentis, subflexuosis, interstitiis longitudinaliter striatis ; apice 

 acuto, vix elevato ; labro tenui ; umbilico magno, profundo, striis 

 cancellato. 



Dimensions. — Diam. 9, long. 8 mill. 



Locality. — Paumotus. 



Shell globose, ventricose, thin, fragile, white, apex rose-col- 

 ored ; corded transversely by fine, close-set, somewhat wrinkled 

 prominent ribs, interstices barred by longitudinal raised strise ; 

 apex acute, rather elevated; lip thin; umbilicus open, deep, ex- 

 tending to the apex, finely cancellated by stride. 



The above differs from Cuvieriana, Reel., principally in its 

 sculpture. 



Neritopsis interlirata, Pease. Plate 23, fig. 26. 



Description. — T. vix oblique-ovata, ad suturas depressa, solida, 

 alba ; spiraliter nodoso-costata, lira minore intercurrente, inter- 

 stitiis, striis elevatis, tenui clathratis ; apertura subcircularis. 



Dimensions. — Diam. 13, long. 10 mill.. 



Locality. — Insl. Annaa. 



Shell somewhat obliquely ovate, depressed at the sutures, 

 solid, white, spirally granosely ribbed, with an intermediate 

 smaller rib, interstices barred by fine, close raised striae ; aper- 

 ture nearly circular. 



I have hesitated to separate the above species from N. radula 

 for reason of the great variation that many marine species of 

 G-asteropod<B undergo at the Paumotus. 



There is also a remarkable resemblance between the fossil 

 species of this genus and the radula in sculpture. 



My collection comprises specimens of the latter from four 

 localities in Polynesia, which surely differ from the above. There 

 appears to be a regular gradation from the fossil species, through 



