ACHATINELLA SWIFTII. 313 



* * Var. Shell sinistral, cinereous-brown, streaked with white 

 and encircled with a few white spiral lines ; suture brown. 



"Station, on trees. Habitat: Kalaikoa and Ahonui, on 

 Oahu ; very rare in Wahiawa and Helemano. 



"Affinities. It seems to be intermediate between A. decorus 

 Fer. and A. apicatus Nwc. Remarks: This species is very 

 rarely dextral. The specimen figured is from Ahonui' 

 (Gulick). 



The coniformis pattern always has a brown line or narrow 

 band bordering the suture below. The embryonic whorls are 

 ivory or buff in varying tints, the tip white or sometimes 

 faintly gray. The later whorls are dusky drab, clove brown, 

 or Vandyke brown streaked with lighter brown or creamy. 

 Some are streaked with very pale purplish gray, others al- 

 most white. Usually there are pale spiral lines, often scarcely 

 visible, or again quite distinct. All of the specimens figured 

 are from Ahonui, pi. 58, fig. 8 agreeing with Gulick 's type. 



This form is identical with A. neglectus Smith, which is 

 merely one color-tone in the coniformis scale. Some speci- 

 mens connect completely with swiftii patterns. 



"Apex tuberans Gk. (pi. 58, fig. 6, type, no. 93 of Gulick 's 

 type series, Bost. Soc.). Shell dextral, globose-conic, glossy, 

 striated with growth (but hardly spiral) lines; cinereous 

 streaked, interrupted with several whitish and blackish-brown 

 zones; suture margined, pallid. Whorls 6, the first three 

 whitish, a little convex, the rest convex ; spire concave. Aper- 

 ture white ; peristome slightly dilated, thickened within, 

 tinted with dilute rose-brown ; columellar fold strong, whitish. 

 Length 20, diam. 13!/2 mm - 



'Var. a. Shell white, variously zoned with brown and buff. 



"Var. &. Shell yellowish, closely zoned with blackish-brown. 



* Station, on trees. Habitat : The metropolis of the species 

 is Kalaikoa, on Oahu. It is also found in Ahonui, and single 

 specimens have been brought from Wahiawa and Helemano. 



"Affinities. It is most nearly allied to A. flavidus Gk. 



"Remarks. This is a dextral species. Sinistral forms are 

 found only in a few specimens passing into other species.' 

 ( Gulick ) . 



The apical whorls are white or ivory yellow, the tip slightly 

 dusky or pale purplish gray. The last whorl, in the type spe- 



