Descriptions of New Species of Achatinella. 229 

 48. Achatinella papyracea. 



Plate VII. Fig. 48. 



T. sinistrorsa, impcrforata, ovato-conica, tenui, polita, leve striata, 

 pallide grisea vcl plumbeo-cincrea, lineis fuscis obscuris ornata ; apice 

 subacuta ; spira, convexo-conica ; sutura marginata, impressa ; anfr. 5£, 

 modice convexis ; plica columellari mediana, albida, levi, subtorta, ; 

 apertura obliqua, sinuato-ovali, intus alba vel cinerea, ; perist. vix incras- 

 sato ; margin c externo recto, arcuato, acuto ; columellari angusto, 

 adnato ; parietali millo. 



Shell sinistral, imperforate, ovate-conic, thin, polished, 

 finely striated, light grey, or of leaden ash color, with obscure, 

 brown spiral, lines ; apex subacute ; spire convexly conical ", 

 suture marginate, impressed; whorls 5^, moderately convex; 

 columellar fold central, usually white, slightly developed, and 

 not strongly twisted ; aperture oblique, sinuately oval, white 

 or grey within ; peristome scarcely thickened, with external 

 margin unreflected, arcuate, acute ; columellar margin narrow, 

 adnate ; parietal margin wanting. 



Length 0.65 inch (16§ mill.) ; breadth 0.38 inch (9f mill.). 



Length of body whorl 0.48 inch (12 mill.). 



Of a large specimen, length O.T-i inch (19 mill.) ; breadth 

 0.41 inch (lOf mill.) ; length of body whorl 0.53 inch (13£ mill.). 



Average weight 2.50 grains. 



Station. — On the Hala {Pandanus odoratissimus) and other 

 trees. J. T. G. ! 

 Habitat. — Kalaikoa, Ahonui, and Wahiawa, Oahu. J. T. G. ! 



Var. h. — Without the brown lines. 



Remarks. — A thin papyraceous shell, a few specimens of 

 which I had the good fortune to obtain from a native girl of the 

 mountain, who regretted the time spent in gathering them, as 

 several had been crushed among her heavier shells. 



DECEMBER, 1856. 16 Ann " Lm NaTi Hist - Vo1 " VL 



