80 MESSRS. GULICK AND SMITH ON [Jan. 7, 



Apex versicolor, Gk. (Plate IX. fig. 18.) 



Testa sinistrorsa, globoso-conica, nitida, incrementi lineis (hand spi- 

 ralibus) striata, griseoalba, nigro-fusco irregulariter strigata et 

 zonata, bast nigro-fusca ; sutura leviter marginata, alba (inter- 

 dum brunnea) ; spira leviter concava ; anfract. 6, primi 3 pal- 

 lidi, convexiusculi, cceteri convexi; aperlura 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 vet sinistrorsa, subgloboso-conica, flava, 

 zonis 2-6 fuscis aut cinereo-fuscis cincta. (Plate X. fig. 1 c.) 



Var. /8. 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, incre- 

 menti lineis oblique (haud spiralibus) striata, brunnea, dilute brunneo 

 strigata, lineis spiralibus pluribus albidis indistincte cincta ; su- 

 tura saturate brunneo marginata ; spira leviter concava ; anfract. 

 6|, primi 3| convexiusculi, albidi, cceteri convexi; apertura re- 

 cedens, 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. 



