io6 Original Dcsniptiovs of Achatinella. 



Hab. Huelo. 



This shell is found in large numbers from Makawao to Nahiku, 

 Maui, and with its several varieties, forms quite a large group. 



169. Achatinella nattii Baldwin & Hartman. 



A. natlii Bald. & Hart. P. Ac. Phila. 1SS8, p. 34, pi. i, fig. 3. 



Shell dextral, turbinate, spire half the length; whorls 5, pol- 

 ished, the last two rapidly enlarged and inflated. Suture impressed, 

 columella yellow, stout and twisted. Color bright gamboge yel- 

 low, with one white and three wide chestnut bands beneath the 

 suture, the latter visible from within the aperture ; aperture round 

 ovate, white, labium white, slightly thickened within. I^ength 

 16, diam. 10 mm. Length ap. 8, diam. 5 mm. 



Hab. Makawao to Honomu. — Bald. 



This, with the preceding A . porcellana Newc, and A.flcviingi 

 Bald. (MS), and also A. ivailuacnsis Sykes, form a group very 

 similar in appearance and which run together. They correspond 

 very well to the various forms of the A. i-eda Newc. of Oahu. 



170. Achatinella wailuaensis Sykes. 



A. 'unilKa^iisis Syke.s. Fauna Haw., lyoo, vol. ii, p. 32s. pi. xi. figs. 19, 20. 



T. (lextrorsa, subperforata. nitida, turrita, solidula, levissime striata, 

 alba, lincis castaneis picta, apud peripheriam zona alba, in sutura linea nigro- 

 castanea notata ; anfr. 5-5 1-2, regulariter crescentes, conyexi ; apertura auri- 

 formis; margine columellari plica fusca mediocri munita, margine dextro 

 acuto, callo parietali tenuissimo. Long. 15.5, alt. 8.4 mill. 



Shell dextral, subperforate, shining, turreted, somewhat solid, 

 very lightly striated, white, colored with chestnut lines, marked 

 about the periphery by a white zone, in the suture by a black- 

 che.stnut line ; whorls 5-5 1-2. regularly increasing, convex ; aper- 

 ture auriform, furnished at the margin of the columella with a small 

 brown fold, dextral margin acute, parietal with a very thin callus. 



Hab. Wailua. — Perkins. 



Very nearly related to A. porcellana Newc. 



MARMORATA GROUP. 

 171. Achatinella marmorata Gould. 



A. mariiioi ala Oould. 1'. Boston Soc. Nat. Hist., ii, 1S47, p. 200. 



vShell dextral, rather solid, of an elongated, acutely conical 

 form, composed of six convex whorls, which are somewhat shoul- 

 dered superiorly ; the la.st large in proportion, and ventricose ; 



