508 



2. Neritina dilatata (pi. cxiii. f. 123, 124, 125), Brod., 

 Zool. Pro., 1832; Conch. 111. f. 11. 



"N. testa ovato-truncata, dorso convexo, albiclo-fusca, lineis 

 nigris angulatis reticulata ; spira oblique incurva ; labro tenui 

 superne sub-biauriculato ; labio subarcuato, denticulate.''^ 



Of a semiglobose form, flat at the side of the aperture, and 

 convex outside ; with the inner lip septiform, the outer lip widely 

 auriculated at the extremities, and the spire nearly terminal. The 

 outer surface is pale, reticulated with dark augulated lines. 



Tahiti ; adherhig to stones in rivers. Cuming. 



3. Neritina cariosa (pi. cxiii. f. 126), Gray, Wood, Supp. 

 t. 8. Nerita, f. 9. N. Nuttah, RecUz. 



N. testa N. dilatatm simili, sed extiis nigra, apertura alba, 

 labio interno tumido, auriculis magis expansis. 



Simdar in form to N. dilatata (Sp, 2), but with the outer surface 

 perfectly black, the aperture white, with the inner lip swelled, 

 and the amides, especially the upper one, more spread ; oper- 

 culmn black. In the Conch. Illust., at f. 5, this species was, by 

 mistake, named N. caffra ; but it was afterwards rectified in the 

 catalogue of species. 



Sandwich Islands ; on stones in small streams. 



4. Neritina Sandwichensis (pi. cxiii. f. 127, 128), Besliayes, 

 Lamarch, Anim. s. vert. New Edit., vol. viii., p. 579. N. Mauritii, 

 Recluz, MS. 



N. testa N. dilatata. simili, sed magis depressa, extus nigra, 

 intiis cinerea ; margine sinistro labii interni oblique truncato. 



Eesembhng N. dilatata (Sp. 2), but flatter, with the margin of 

 the inner lip obhque, and the upper angle rather sharp. Inside 

 blueish ash, outside black. The mistake committed in the Conch. 111. 

 (afterwards corrected), in naming fig. 5 iV. caffra, instead of N. 

 cariosa, led M. Deshayes to give the above name to our figure of 

 the latter species. We imagine, however, from the description, tliat 

 M. Deshayes had before liim specimens of the shell to w^hich we 

 now apply it. 



Sandwich Islands, and the Mauritius. 



5. Neritina AURicuLATA (pi. cxiii. f. 129, 130), Lam. Anim. 

 s. vert. E. M. p. 455. f. 6. 



N. testa ovali, transverse substriata, dorso elevato, rotundato ; 



