186 Descriptions of New Species of Achatinella. 



slightly thickened ; with dextral margin mireflected, arcuate ; 

 columellar margin dilated, adnate ; parietal margin thin. 



Length 0.2T inch (7 mill.). Breadth 0.13 inch (3J mill.). 



Length of body whorl 0.18 inch (4^ mill.). 



Average weight 0.10 grain. 



Var. o. — Color, claret. 



Station. — Under stones on dry hill sides. J. T. G-. ! 



Habitat. — Keawaawa, Oahn. J. T. G. ! 



Remarks. — A. grana Newc. found in the fields of Makawao, 

 E. Maui, is allied ; but is smaller, more cylindrical, with aper- 

 ture more nearly oval, lip and columella white, and umbilical 

 cleft open. 



14. Achatinella crystallina. 



Plate VI. Fig. 14. 



T. dextrorsa, impcrforata, oblonga, tenui, nitida, perpellucida, vitrea, 

 sub lente levissime striata ; apicc obtusula ; spira convexo-conica ; sntura 

 s-implici, modice impressa ; anfr. 6, convexiusculis ; plica, columcllari 

 mediana, levi, cornea ; apertura rotundato-lunari ; pcrist. simplici, pallidc 

 limbato ; margine dextro recto, arcuato ; columellari dilatato. 



Shell dextral, imperforate, oblong, thin, shining, transparent, 

 vitreous, microscopically very finely striated ; apex somewhat 

 obtuse ; spire convexly conical ; suture simple, moderately 

 impressed ; whorls G, somewhat convex ; columellar fold cen- 

 tral, corneous, but slightly developed ; aperture rotundately 

 lunate ; peristome simple, bordered with white ; with dextral 

 margin unreflected, arcuate; columellar margin dilated. 



Length 0.21 inch (G mill.). Breadth 0.12 inch (3 mill.). 



