Descriptions of New Species of Achathiella. 209 



Remarks. — This species is characterized by its unpolished 

 brown exterior. 



35. Achatinella lignaria. 



Plate VII. Fig. 35. 



T. dextrorsa, perforata, ovato-conica, solida, magis minusve nitida, 

 sub lente minutissime decussata, luteo-eburuea, interdum strigata, ; apice 

 subacuta, alba, luteo oblique notata ; spira regulariter conica ; sutura 

 modice impressa, vix marginata ; anfr. 6£, convexiusculis ; ultimo r \\ 

 longitudinis aequante ; plica columellari valida, alba, ; apertura parum 

 obliqua, sinuato-ovali ; peris, incrassato, interdum antice subexpanso et 

 subreflexo ; margine columellari dilatato, albo, patente ; parietali nullo. 



Shell dextral, perforate, ovate-conic, solid, more or less shin- 

 ing, microscopically minutely decussated, yellowish ivory-white, 

 sometimes streaked ; apex subacute, white, obliquely marked 

 with brownish yellow ; spire regularly conical ; suture mode- 

 rately impressed, scarcely margined ; whorls 6h, somewhat 

 convex ; the last equal to -,-Vo °f t^ e length ; columellar fold 

 strong, white ; aperture somewhat oblique, sinuously oval ; peri- 

 stome thickened, sometimes slightly expanded and reflected 

 anteriorly ; columellar margin dilated, white, unattached ; parie- 

 tal margin wanting. 



Length 0.80 inch (204 mill.) ; breadth 0.41 inch (10| mill.). 



Length of aperture 0.35 inch (9 mill.). 



Average weight 5.50 grains. 



Remarks. — This species differs from A. induta Nob. in its 

 smaller size, more acuminate form, lighter color, and in the 

 polished exterior of some of its varieties. 



Yar. o. — More ventricose ; aperture nearly semiorbicular. 

 This variety passes into A. induta. 

 Yar. c. — More elongate. 



