508 



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

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



"N. testa ovato-truncata, dorso convexo, albido-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 hp widely 

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

 outer surface is pale, reticulated with dark augulated lines. 



Tahiti ; adhering to stones in rivers. Cuming. 



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

 t. 8. Nerita, f. 9. N. Nuttali, Recluz. 



N. testa N. dilatata, simili, sed extus nigra, apertura alba, 

 labio interno tumido, auricuhs magis expansis. 



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

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

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

 culum 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), Beshayes, 

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

 Recluz, MS. 



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

 intus cinerea; margine sinistro labii interni oblique truncate 



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

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

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

 (afterwards corrected), in naming fig. 5 N. 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, that 

 M. Deshayes had before liim specimens of the shell to which 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 ; 



