178 Dcscrijytions of JVew Sjiccics of Achatinella. 



and revolving above the suture, minutely regularly ribbed ; 

 spire turreted, with pale, obtuse apex ; suture simple, mode- 

 rately impressed ; whorls 7, convex ; columellar fold central, 

 brown ; aperture pyriform ; peristome simple ; with dextral 

 margin unreflected, pale, laterally compressed, slightly arcuate 

 anteriorly ; columellar margin thin, brown, adnate ; parietal 

 margin very thin, white. 



Length 0.33 inch (S£ mill.). Breadth 0.14 inch (31 mill.). 



Length of body whorl 0.19 inch (5 mill.). 



Average weight 0.30 grain. 



Station. — On the ground in the woods. J. T. G. ! 



Habitat. — Pupukea, Waiinea, and Kawailoa, Oahu. J. T. G. ! 



Remarks. — A rare and delicate species, so finely and regu- 

 larly ribbed and perfectly polished, as to give it a glistening, 

 silky appearance. 



This species presents a new and very interesting form of the 

 subgenus Leptachatina (Gould). 



It seems to be more nearly allied to A. striatella Nob., which 

 is found at the other end of the mountain range, than to any 

 other known species ; and through that it may be grouped 

 with A.fusca Newc. 



6. Achatinella striatella. 



Plate VI. Fig. 6. 



T. dextrorsa, imperforata, turrito-ovata, tenuiusenla, vix nitidula, satu- 

 rate fusco-comea, regulariter striata ; apice obtusula ; sutura simplici, 

 modice impressa ; anfr. G£, convexis ; plica commellari medians!, fusca 

 vel albida ; apertura vertical!, truncato-ovali ; perist. simplici ; margine 

 dextro recto, arcuato ; columcllari dilatato, tenui, albido, adnato ; paric- 

 tali nullo. 



