io6 Original Descriptions of Achatinella. 



Hab. Huelo. 



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

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



169. Achatinella nattii Baldwin & Hartman. 



A. nattii Bald. & Hart. P. Ac. Phila. 18S8, 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. Length 

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



Hab. Makawao to Houomu. — Bald. 



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

 Bald. (MS), and also A. 7vailuaensis Sykes, form a group very 

 similar iu appearance and which run together. They correspond 

 very well to the various forms of the A. recta Newc. of Oahu. 



170. Achatinella wailuaensis Sykes. 



A. wailuaensis Sykes. Fauna Haw., 1900, vol. ii, p. 32S, pi. xi, figs. 19, 20. 



T. dextrorsa, subperforata, nitida, turrita, solidula, levissime striata, 

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

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

 formis ; margine columellari plica fusca mediocri munita, margine dexlro 

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



Shell dextral, subperf orate, 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- 

 chestnut 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. 



. I . mat »i, n ata Could. P. Boston Soc. Nat. Hist., ii, 1S47, p. 200. 



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

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

 dered superiorly ; the last large in proportion, and ventricose ; 



