246 AMASTRA, LANAI. 



mouth, above the middle of the outer margin, as in A. bipli- 

 cata. The largest shells have 7% whorls, the smaller ones 7. 



Length 20, diam. 9.2, aperture 7.9 mm. 



Length 20, diam. 8.5, aperture 7.1 mm. 



Length 17.5, diam. 8.3, aperture 7 mm. 



Length 18.3, diam. 7.9, aperture, 7 mm. 



Fig. 9 is from no. 42408cr, U. S. Nat, Mus. ; fig. 10 is one of 

 three shells in no. 13432, Boston Society, a much stouter var- 

 iety, which may represent another subspecies, length 14, diam. 

 8 mm., aperture 6.9 mm. ; 61/3 whorls. 



64. A. MCESTA (Newcomb). PL 17, figs. 7, 9; pi. 26, fig. 10. 



" Shell dextrorsal, turrito-conical ; whorls 7, convex, longi- 

 tudinally striated ; aperture small, ovate, slightly contracted ; 

 columella straight with a strong white spiral callus in the 

 middle. Color reddish-brown ; the upper whorls black ; the 

 middle with black zigzag lines, the last covered with a dark- 

 brown epidermis " (Newc.}. 



No dimensions given ; figure measures, length 18, diam. 7.9 

 mm. 



Lanai (Newc.) . 



Achatinella mtxsta NEWC., P. Z. S., 1853, p. 157, no. 77, pi. 

 24, f. 77 (1854). PFR., Monogr., iv, 555. Amastra mccsta 

 SYKES, Fauna Hawaiiensis, p. 340. Achatinella obscura 

 NEWC., P. Z. S., 1853, p. 157, no. 78, pi. 24, f. 78 (1854). 

 Amastra long a SYKES, Proe. Malac. Soc., London, ii, Oct., 

 1896, p. 129 ; Fauna Hawaiiensis, p. 339, pi. 11, f. 35. 



Distinguished by its slender and elongate shape, like some 

 East Mauian species, but very unlike them in the sculpture 

 of the embryonic whorls. After the smooth initial half-whorl 

 there are two whorls with fine, close, sharp striation (shown 

 too coarse in pi. 26, fig. 10). Later whorls have low growth- 

 wrinkles. The first 3 or 4 whorls are dark purple-brown, the 

 last two whorls very pale brown or creamy, partly covered 

 with a thin blackish cuticle, which is mottled or obliquely 

 striped on the intermediate whorls, and is sometimes almost 

 wholly deciduous. The aperture, columella. and parietal cal- 

 lus are flesh-colored. Columella short, bearing a stout median 



