Descriptions of New Species of Achatinella. 195 



sutura simplici, modice impressa ; anfr. fere 7, convexiusculis ; columella 

 pallide cornea, intus leviter plicata ; apertura pyriformi ; perist. sim- 

 plici ; margine dextro recto, arcuato ; columellari angusto, adnato ; parie- 

 tali nullo. 



Shell clextral, imperforate, elongately ovate, thin, shining, pel- 

 lucid, vitreous, microscopically finely striated ; apex rather 

 obtuse ; spire convexly conic ; suture simple, moderately im- 

 pressed ; whorls nearly 7, somewhat convex ; columella lightly 

 plaited deep within the aperture ; aperture pyriform ; peristome 

 simple ; with dextral margin uureflected, arcuate ; columellar 

 margin narrow, adnate ; parietal margin wanting. 



Length 0.32 inch (8 mill.). Breadth 0.14 inch (31 mill.). 



Length of body whorl 0.18 inch (li mill). 



Average weight 0.17 grain. 



Station. — . . . ? Undoubtedly on the ground. 



Habitat. — Hawaiian Islands. ! 



Remarks. — Resembles A. triticea Nob., but differs in its 

 clear glassy appearance, and nearly obsolete columellar fold. 



24. Achatinella parvula, 



Plate VI. Fig. 24. 



T. dextrorsa, imperforata, conico-oblonga, tenui, nitida, pellucida, sue- 

 cineo-vitrea, sub lente levissime striata ; apice obtusa ; spira convexo- 

 conica, ; sutura simplici, modice impressa ; anfr. 6, convexiusculis ; colu- 

 mella, intus levissime plicata ; apertura pyriformi ; perist. simplici, 

 recto ; margine columellari angnsto, adnato ; parietali nullo. 



Shell dextral, imperforate, conic-oblong, thin, shining, pellu- 

 cid, glassy, of amber hue, microscopically very finely striated ; 



