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Show 80 MESSRS. GULICK AND SMITH ON [Jan. 7, APEX VERSICOLOR, Gk. (Plate IX. fig. 18.) Testa sinistrorsa, globoso-conica, nitida, incrementi lineis (haud striata, griseo alba, nigro-fusco irregulariter strigata zonata, basi nigro-fusca; sutura leviter marginata, alba (interdum brunnea); spira leviter concava; anfract. 6, primi 3 pallidi, convexiusculi, cceteri convexi; apertura alba, recedens; perist. aliquanto dilatatum, intus limbatum dilute roseo-fusco tinctum; plica columellaris valida, pallide rosea. Long. 19 mill., diam. 13. Var. Testa griseo-alba vix strigata; anfract. ult. ad peripheriam basimque nigro-fusco zonatus. Station. On trees. Habitat. Ahonui and Kalaikoa, on Oahu. Affinities. It seems to be an intermediate form between A. de-corus, Fer., and A. tuberans, Gk. Remarks. This species is always sinistral. The specimen figured is from Ahonui. APEX FLAVIDUS, Gk. (Plate X. fig. 1.) Testa dextrorsa (interdum sinistrorsa) breviter ovato-conica, parum nitida, incrementi lineis (haud spiralibus) striata, plusve minusve flavida, anfract. medio zona lata fusca (basi interdum zonis 2-3) cincta; sutura anguste fusco (interdum albo) marginata ; anfract. 6, convexiusculi, primi 3 semper albi; spira fere recte conica, vix concava; apertura albida, recedens; perist. pallide roseum, aliquanto dilatatum, intus incrassatum; plica columellaris magna, rosea. Long. 20 mill., diam. 12|. Var. a. Testa dextrorsa vel sinistrorsa, subgloboso-conica, flava, zonis 2-6 fuscis aut cinereo-fuscis cincta. (Plate X. fig. i a.) Var. 3. Testa omnino flava. Station. On trees. Habitat. The metropolis is in Kalaikoa, on Oahu; it is also found in Ahonui. Affinities. It is most nearly allied to A. tuberans, Gulick. Remarks. In Kalaikoa all are dextral; in Ahonui one tenth are sinistral. The specimens figured are from Kalaikoa. APEX CONIFORMIS, Gk. (Plate IX. fig. 23.) Testa sinistrorsa (interdum dextrorsa), globoso-conica, nitida, incrementi lineis oblique (haud spiralibus) striata, brunnea, dilute brunneo strigata, lineis spiralibus pluribus albidis indistincte cincta; saturate brunneo marginata; spira leviter concava ; anfract. 6|, primi 3\ convexiusculi, albidi, cceteri convexi; apertura recedens, alba; perist. paululum dilatatum intusque incrassatum, margine dilute roseo (vel brunneo) tinctum; plica columellaris valida. Long. 18 mill., diam. 12. Var. Testa sinistrorsa, cinereo-fusca, albo strigata, et lineis paucis spiralibus albis cincta ; sutura brunnea. |