198 Descriptions of New Species of Achatinella. 



Length 0.70 incli (19| mill.) ; breadth 0.42 inch (10f mill.). 

 Length of body whorl 0.53 inch (13£ mill.). 

 Weight 2.50 grains. 



Station. — ...../ 



Habitat. — Hawaiian Islands. J. T. G. ! 



Remarks. — Somewhat resembles A. JS-uddWNewc. in style of 

 coloring, but lacks the black tip of that species, and decidedly 

 differs in the reflected lip, and deeply perforated umbilicus. 



27. Achatinella lactea. 



Plate VI. Fig. 27. 



T. sinistrorsa, perforata, acuininato-ovata, solida, striatula, sub lente 

 levissime decussata, eburnea ; apice acuta ; spira coniea, leviter con- 

 vexa ; sutura marginata, subimpressa ; anfr. 6^-, plano-convexis ; plica 

 columellari mediana, fusca, valida ; apertura obliqua, sinuato-ovali, 

 intus rubido-fusca ; perist. albo, intus incrassato ; margine cxterno antice 

 subreflexo, arcuato ; columellari dilatato, subpatente : parietali tenui. 



Shell sinistral, perforate, acuminately ovate, solid, shining, 

 finely striated, and microscopically very finely decussated, 

 color ivory white ; apex acute ; spire conical, with outlines 

 slightly convex ; suture marginate, slightly impressed ; whorls 

 6£, flatly convex; columella!' fold central, brown, strong; 

 aperture oblique, sinuately oval, reddish brown within ; peri- 

 stome white, thickened within ; with external margin arcuate, 

 slightly reflected anteriorly; columellar margin dilated, slightly 

 detached ; parietal margin thin. 



Length 0.86 inch (22 mill.) ; breadth 0.45 inch (llf mill.). 



Length of body whorl 0.59 inch (15 mill.) 



Weight 8.00 grains. 



Station. — . . . . ? Probably on trees. 



