ACHATINELLA SPALDINGI AND LEHUIENSIS. 271 



by two specimens. Only of A. spaldingi was a. fair series 

 obtained. All of the known colonies are on the northern 

 slope of the range. Who knows how many more wait hidden 

 in dark and difficult ravines, or perhaps a few steps aside 

 from some well-trodden trail ! 



Probably all of the Waianae forms are descendants of a 

 single species, which migrated from the Koolau range, along 

 with Partulina dubia and the ancestor of Achatinella 

 mustelina. 



28. A. SPALDINGI Pilsbry & Cooke, n. sp. PL 42, figs. 1, 2, 3. 



The shell is sinistral, imperforate, ovate-conic, ventricose 

 and quite thin-, white, with slightly interrupted or spotted 

 tawny bands and lines, of which band ii, above the periphery, 

 is the most constant. There is usually a group of bands near 

 the columella, and a space without bands at and below the 

 periphery ; suture edged with a band or line of the white 

 ground ; apex a trifle dusky. Surface not very glossy, or 

 often dull in old shells, somewhat roughened by growth- 

 wrinkles and irregularly scattered impressions. Whorls con- 

 vex, joined by an impressed suture. Aperture white and 

 showing the bands weakly within ; outer lip not expanded, 

 thin, acute. Columellar fold whitish, spiral, small. 



Length 16.5, diam. 11.1, aperture 9.2 mm., 5% whorls. 



Length 17.2, diam. 11.1 mm. 



Length 17.2, diam. 11 mm. 



Oahu, Waianae range: Pukuloa, one-half mile above the 

 Mountain House, back of Leilehua (Spalding). Cotypes in 

 A. N. S. P. and Bishop Mus. ; also in coll. Irwin Spalding. 



This species has the thin texture of A. papyracea, but it is 

 a much more capacious shell, differing in surface and color; 

 the spire is somewhat more attenuate near the apex. Quite 

 old specimens have a thickening within the lip, which is want- 

 ing in most adults. It is one of the few really distinct species 

 of Achatinella strum. Named for a valued friend of both 

 authors. 



29. A. LEHUIENSIS E. A. Smith. PL 41, fig. 11. 



" Shell sinistral, ovate-conic, somewhat glossy, very finely 



