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Show 74 MESSRS. GULICK AND SMITH ON [Jan. 7, which is readily distinguished from this by the two black lines upon the periphery of the whorl. The black or dark brown lines of that species belong to the solid substance of the shell, while the green and yellow bands of this species belong to the epidermis. Remarks. No dextral form of this shell has been found. The specimen figured is from Halawa. ACHATINELLA AUGUSTA, Sm. (Plate IX. fig. 7i) B.M. Testa sinistrorsa, ovato-conica, nitida, incrementi lineis et transversim exilissime striata, viridis, saturate viridi strigata lineisque spiralibus viridibus rufisque obscuris cincta, infra suturam albam zona flava ornata ; sutura distincte albo marginata; anfract. 6|, primi 4 convexiusculi, ccsteri convexi; apertura alba; perist. tenue, intus dilute fusco tinctum ; plica columellaris valida, fusco-rosea. Long. 24 mill., diam. 12|. Var. Testa omnino flava, suturam infra zona alba cincta. Station. On trees. Habitat. The metropolis of the species is Waialae, near the east end of Oahu. It is also found in Wailupe and Palolo. Affinities. This species is, on the one hand, closely related to A. plumata, Gk., from which it is distinguished by its green and yellow epidermis, which is entirely wanting in that species, and to A. fulgens, N w c , from which it differs in being without the broad black bands, which belong not only to the epidermis, but to the solid part of the shell of A. fulgens. It has been described by Newcomb and Pfeiffer as a variety of the latter species. Remarks. This species is always sinistral. The specimen figured is from Waialae. ACHATINELLA RHODORHAPHE, Sm. (Plate IX. fig. 10.) B.M. Testa sinistrorsa, breviter ovato-conica, imperforata, nitida, incrementi lineis et transversim (sub lente) exilissime striata, flava, suturam infra zona lata dilute rosea cincta; anfract. 6, convexi, primi 3 albi; sutura distincte marginata; apertura alba; perist. margine acuto intus limbatum; plica columellaris valida, rosea (interdum alba). Long. 15 mill., diam. 8|. Var. Testa flava, suturam infra castaneo zonata. Station. On trees. Habitat. The metropolis of the species is Helemano, on Oahu. It is also found in Ahonui, Wahiawa, Opaiula, and Kawailoa. Affinities. It is related to A. livida, Swn., and A. curta, N w c , but is easily distinguished from either. Remarks. This species is always sinistral. ACHATINELLA DILUTA, Sm. (Plate IX. fig. 14.) B.M. Testa dextrorsa, ovato-subconica, nitida, incrementi lineis transver-simc/ ue indistincte minutissime striata, dilute luteo-virens, pluribus transversis viridibus obscuris cincta; sutura leviter mar- |