212 AMASTRA, OAHU. 



lines. Spire long, conoid-tapering, acute. Whorls 8, the first 

 uniformly colored, flattened, the rest a little convex, suture 

 impressed, last whorl larger, somewhat tapering, rotund-oval. 

 Aperture distinctly oblique, not very large, irregularly oval, 

 tapering above. Columella moderately thickened, whitish, 

 armed with an acute, prominent, oblique fold remote from the 

 base. Peristonie simple, acute, the margins joined by a glossy 

 callus in adults. Length 20, diam. 8.5, alt, apert. 7 mm." 

 (Ancey). 



Oahu: district of Waianae (Baldwin) ; near Waianae and 

 Waialua (U. S. Nat. Mus.). 



Amastra frosti ANCEY, Memoires de la Societe Zoologique 

 de France, v, 1892, p. 719. SYKES, P. Malac. Soc. Lond., iii, 

 p. 275, pi. 13, f. 12 (co-type). Achatinella frosti THWING, 

 Orig. Descriptions, etc., p. 161, pi. 3, f. 18 (good). 



Smaller than A. cylindrica, with straight lateral outlines 

 and a more glossy surface. Mr. Sykes 's figure of one of An- 

 cey 's co-types is copied, fig. 2. A lot before us from C. M. 

 Cooke coll., consists of shells smaller than the dimensions 

 assigned by Ancey. Length 16.7, diam. 7.9, aperture 6.2 mm., 

 whorls 1^/2- The apex is clear whitish with weak, fine, longi- 

 tudinal strias ; bands begin on the third whorl. The ground- 

 color is whitish, the bands chestnut. There is no outer layer 

 of deciduous cuticle. One of these shells is figured, fig. 3. 



46. A. TENUISPIRA Baldwin. PI. 37, fig. 1. 



"Shell dextral, imperf orate, solid, acuminately turreted, 

 spire conical, apex subacute ; surface lusterless, covered with 

 somewhat rude, irregular incremental striae ; the embryonic 

 whorls very finely, radiately sulcated. Color light brown, 

 upper whorls darker; covered with an earthy-brown, fuga- 

 cious epidermis. Whorls 7, somewhat convex, in some exam- 

 ples slightly margined above; suture well impressed. Aper- 

 ture oval, oblique, rather small, light, brown within ; peristome 

 simple, acute, extremities united with a thin callosity; colu- 

 mella sub-biplicate, light brown, tortuous, abruptly terminat- 

 ing in an oblique, dentiform plait. Length 17, diam. 

 mm." (Baldwin}. 



