250 Descriptions of New Species of Achatinellq. 



rounded ; columellar fold central, white, strong ; aperture 

 oblique, truncately auriform ; peristome black, slightly thick- 

 ened within ; with external margin slightly reflected anteriorly, 

 arcuate ; columellar margin dilated, adnate ; parietal margin 

 wanting. 



Length 0.83 (21 millim.); breadth 0.50 inch (13 millim.). 



Length of body whorl 0.61 inch (15^ millim.). 



Average weight 8.80 grains. 



Station. — On trees. J. T. G. ! 



Habitat. — Kaawa and Kahana, Oahu. J. T. G. ! 



Remarks. — There is a variety with two black bands which 

 resembles certain forms of A. ovata Newc, but is distinguished 

 by its black suture and its thinner and more regularly arcuate 

 lip. Its bands are also deep black, while those of A. ovata are 

 brown as in A. hulimoides Swains. 



68. Achatinella torricla. 



Plate VIII. Fig. 68. 



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

 gosa, virente vel fulva : apice subacute, castanea ; spira conica ; sutura 

 leviter marginata, alba, modice impressa; anfr. 6, convexis; plica, colu- 

 mellari supera, alba, valida ; apertura obliqua, truncato-aurilbrmi, intus 

 all >ii ; perist. intus incrassato, albo ; margine externo anticc vix reflexo, 

 leviter substricto; oolumellari dilatato, adnato; parietali nullo. 



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

 what rugose, green or fulvous ; apex subacute, chestnut ; spire 

 conic ; suture lightly margined, white, moderately impressed ; 

 whorls 6, convex; columella with a strong white fold near the 

 body whorl ; aperture oblique, truncately auriform, white 

 within ; peristome white, thickened within ; with external mar- 

 gin scarcely reflected anteriorly, slightly compressed ; colu- 

 mellar margin dilated, adnate ; parietal margin wanting. 



Length 0.68 inch (17 J millim.) ; breadth 0.38 inch (9§ millim.). 



