Descriptions of Neiv Species of Achatinella. 27 



15. Achatinella Helena. 



Testa sinistrorsa, ovato-conica, striis exile decussata, rufa, lineis zic- 

 zac albis, latis, longitudinalibus alternante, interdum anfractu ultimo 

 albo-fasciato ; anfractibus quinque, ventricosis ; sutura profunda, sim- 

 plici ; apertura ovata ; columella sub-callosa. 



Shell sinistral, ovate-conical, with finely decussating stria?, 

 rufous, alternating with broad longitudinal zig-zag white lines 

 covering the entire shell ; the last whirl often encircled by a 

 white band ; whorls five, rounded ; suture deep, simple : aper- 

 ture ovate, columella slightly callous. 



Length 0.5 inch. Breadth 0.22 inch. 



Eabita t. — Molokai. 



Remarks. — This beautiful shell is dedicated to the lady who 

 delineated the species herein described, and prepared them for 

 publication. 



16. Achatinella labiata. 



Testa, dextrorsa, elongata, subovata, plumbea, ; anfractibus septem, 

 planis, tertio angustiori, pallidiori, ultimo fascia alba suturali ; sutura 

 submarginata ; apertura elongato-ovata ; columella brevi, in dentem 

 prominentem, plicatum desinente ; labio incrassato, albido, callo interno 

 centrali munito. 



Shell dextral, elongate-ovoid, plumbeous except the third 

 whorl, the margin of the outer lip, and along the suture of the 

 last whorl, which are white ; whorls seven, flattened ; the third 

 narrower than the second : suture slightly margined below ; 

 aperture elongate-ovate : columella short, with a strong, plaited 

 projecting tooth ; lip thickened, white, with a central internal 

 callosity. 



Length 0.5 inch. Breadth 0.21 inch. 



Habitat. — Oahu. 



