234 Descriptions of New Species of Achatwella. 

 53. Acliatinella caesia. 



Plate YIII. Fig. 53. 



T. sinistrorsa, imperforata, ovato-conica, solida, nitida, striata, cinerea ; 

 apice acutinscula ; spira, convexo-conica ; sutura niarginata, modice im- 

 prcssa ; anfr. 6^-, convcxis ; plica colurnellari mediana, alba, mcdiocri ; 

 apertura sinuato-ovali, iutus albida ; perist. intus vix incrassato ; mar- 

 gine externo recto, arcuato, acuto, fusco-liinbato ; columellari dilatato, 

 adnato ; parietali nullo. 



Shell sinistral, imperforate, ovate-conic, solid, shining, stri- 

 ated, so streaked with white and fawn brown as to have a grey 

 appearance ; apex somewhat acute ; spire convexly conic ; 

 suture marginate, moderately impressed ; whorls 6£, convex ; 

 columellar fold central, white, moderately developed ; aperture 

 sinuately oval, white within ; peristome slightly thickened 

 within ; with external margin nnreflected, arcuate, acute, 

 edged with brown ; columellar margin dilated, adnate ; parietal 

 margin wanting. 



Length 0.72 inch (18i millim.); breadth 0.42 inch (lOf 

 millim.). 



Length of body whorl 0.50 inch (13 millim.). 



Average weight 4.00 grains. 



Station.— On trees. J. T. G. ! 

 Habitat. — Waimea, Oahu. J. T. G. ! 



Remarks. — This with A. concidens and A. formosa Nob., 

 which are found in "Waimea, correspond to A. undulata JSTewc, 

 A. Emersonii Newc, and A. glauca Nob. found in Kawailoa. 



54. Achatinella concidens. 



Plate VIII. Fig. 54. 

 T. sinistrorsa, imperforata, ovato-conica, solida, nitida, striata, fusca, 



