246 Descriptions of New Species of Achatinella. 



valida ; apertura obliqua, trvmcatoauriformi ; perist. albo, intus incras- 

 sato ; marginc extcrno subrcflexo, arcuato ; columcllari elcvato, sinuato, 

 obtuso, subpatentc ; parietali tenui. 



Shell sinistral, subperforate, ovate, obliquely truncated at the 

 base, solid, shining, striated, of ashen lead-color, with a broad 

 white band beneath the suture ; apex obtuse, of a yellowish 

 white color ; spire convexly conical ; whorls 6, subconvex ; the 

 last large; columellar fold central, white, strong; aperture 

 oblique, truncately auriform, nearly white within ; peristome 

 white, thickened within ; with external margin somewhat re- 

 flected, arcuate; columellar margin forming an obtuse, sinuous 

 ridge with a small umbilical cleft behind it ; parietal margin thin. 



Length 0.90 inch (23 millim.); breadth 0.50 inch (13 millim.). 



Length of body whorl 0.65 inch (16^- millim.) 



Average weight 9.00 grains. 



Station.— On trees. J. T. G. ! 

 Hcibitat.— Kahana, Oahu. J. T. G. ! 



RemavTcs. — Is allied to A. ovata ISTewc, with which it is 

 associated geographically, but differs from it in its broader form 

 and white lip. The dark coloring of the body whorl abruptly 

 terminates near the external margin of the peristome, leaving a 

 white border about an eighth of an inch in width around the 

 outside of the lip, whereas in A. bulimoides and other allied 

 species the color becomes darker on this portion of the shell, 

 though the lip itself be white. 



Dextral specimens are very rare. The coloring of the darker 

 portion of the shell varies in different specimens from a dirty 

 cream to slate color, but the ashy color given in the description 

 is the most common. 



64. Achatinella oomorpha. 



Plate VIII. Fig. 64. 

 T. dextrorsa, perforata, ovata, solida, nitida, striata, cinerca, v'el cinereo- 



