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Show 84 MESSRS. GULICK AND SMITH ON [Jan. 7, vestiti; spira subturrita, sutura simplex; apertura alba, antice roseo tincta (interdum alba) ; perist. tenue, intus levissime incrassatum; columella arcuata, labro callo tenui juncta, dente compresso subbasali munita. Long. 15 mill., diam. 8|. * Station. On the ground in the forest. Habitat. The metropolis of the species is Waialei, on Oahu. It is also found in Kahuku and Hanula, and rarely in Kawailoa. Affinities. It is allied to Am. rubens, Gould, and Am. decorticata, Gk. ; but it is thinner, smaller, and darker in colour than the former, and has a more convex spire than the latter. Remarks. It is always dextral. The specimen figured is from Waialei. A M A S T R A DECORTICATA, Gk. (Plate X. fig. 14.) Testa ovato-conica, dextrorsa, incrementi lineis leviter striata, castanea, labrum versus nigrescens; anfract. 6-6\, convexiusculi, primi 3 politi; sutura simplex, pallida; apertura intus dilute sordido - ceerulea; perist. tenue intus nigrescens, vix incrassatum; plica columellaris tenuis. Long. 16 mill., diam. 8-f, Station. Under dead leaves in the forest. Habitat. The metropolis of the species is Kawailoa, on Oahu. It is also found in Helemano, Opaiula, Waimea, Waialei, and Kahuku. Affinities. It is allied to Am. elliptica, Gk., the metropolis of which lies to the north-west of this, and to Am. inflata, Pfr., which is found in the valleys to the east. Remarks. It is always dextral. The specimen figured is from Kawailoa. A M A S T R A RUBIDA, Gk. (Plate X. fig. 12.) B.M. Testa dextrorsa, elongato-ovata, incrementi lineis striata, dilute rubro-castanea (epidermide nigrescenti raro induta) ; anfract. 6, convexiusculi, primi 2 lecves fusci; sutura simplex; apertura parva, intus subpurpurea; perist. tenue; plica columellaris tenuis-sima. Long. 18 mill., diam. 9. Station. On the ground in the forest. Habitat. Kahuku, on Oahu. Affinities. It is allied to Am. elliptica, Gk., but differs in being more elongate in form, thicker in structure, and for the most part destitute of epidermis. Remarks. It is always dextral. AMASTRA RUSTICA, Gk. (Plate X. fig. 17.) B.M. Testa dextrorsa, imperforata, ovato-conica, incrementi lineis leviter striata, sub epidermide olivacea, dilutissime rubescens; anfract. 6, convexiusculi, primi 2 fortiter, tertiusque levius sulcati; sutura simplex, parum profunda; apertura parva, spiram non ceqnans, subrubescens; perist. arcuatum, tenue; columella brevis, plica inconspicua munita, labro callo pertenui juncta. |