148 ACHATINELLA DECIPIENS. 



form is therefore uncertain. It needs comparison with pul- 

 cherrima and mahogani. There is, however, a lot of maho- 

 gani-like shells in the Gulick collection (no. 125) from Ka- 

 hana, having the apex dark, and agreeing fairly well with 

 planospira. 



The original account follows. A. planospira Pfr. (pi. 30, 

 fig. 8, photographically reproduced from Pfeiffer's plate). 

 ; Shell dextral, imperforate, ovate-pyramidal; solid, closely 

 striate and under the lens very obsoleteily striate spirally, 

 glossy; blackish, ornamented with several narrow white or 

 buff bands. Spire conic, rather acute; suture linear, mar- 

 gined. Whorls 5!/o, flat, the last a little shorter than the 

 spire, obsoletely angular, rounded basally. Aperture oblique, 

 inverted ear-shaped. Columellar fold above, strong, twisted, 

 white. Peristome thickly white-lipped, the right margin, 

 spreading, narrowly expanded, columellar margin adnate. 

 Length 19, diam. 9y 2 mm., aperture 9 mm. long, 4 wide. Var. 

 Z>, above blackish-chestnut, the last whorl tawny, with brown 

 lines. Sandwich Is., Frick in Cuming coll : (Pfr.). 



Variety torrida Gulick. PL 32, figs. 8 to 12c. 



The sinistral form of corrugata was described as A. torrida 

 by Mr. Gulick. The distinction from corrugata is rather too 

 vague to rank it as a subspecies, though there is a certain 

 amount of racial differentiation. Its patterns differ in many 

 specimens, and then most torrida are sinistral. The original 

 account follows. 



" Shell sinistral, imperforate, ovate-conic, solid, shining, 

 somewhat rugose, green or fulvous; apex subacute, chestnut; 

 spire conic ; suture lightly margined, white, moderately im- 

 pressed; whorls 6, convex; columella with a strong white fold 

 near the body-whorl. Aperture oblique, truncately auriform, 

 white within ; peristome white, thickened within, with external 

 margin scarcely reflected anteriorly, slightly compressed; 

 columellar margin dilated, adnate ; parietal margin wanting. 



Length IT 1 /-}, breadth 9% mm. ; average weight 4.5 grains ' 

 (Gulick). 



11 Var. I), with black spiral lines. I am in doubt 'Concerning 

 the limits of variation of this species ; var. & may be distinct ' 

 (Gulick) . 



