26 Descriptions of New Sj^ecies of Achatinella: 



laribus dissecta, fusca, superne lineis albis longitudinalibus notata ; 

 anfractibus sex, plano-convexis ; sutura profunda ; apertura oblongo- 

 ovata : columella simplici, plana, ; labio simplici. 



Shell sinistral, acuminate, turreted, with the surface irregu- 

 larly cut up into furrows, ridges, and tubercles by deep longi- 

 tudinal sulcations crossed by strongly developed transverse 

 strias ; color brown, with white longitudinal lines on the upper 

 whorls; whorls sis, flatly convex; suture deep; aperture 

 oblong-ovate ; columella plain and smooth ; outer lip simple. 



Length 0.65 inch. Breadth 0.25 inch. 



Habitat. — Molokai. 



Remarks. — The last two species, together with the A. plicata 

 Mighels, form a group peculiarly interesting ; deviating from 

 the typical forms sufficiently to warrant a separation from 

 the genus Achatinella. Should the number of species be multi- 

 plied they may with propriety be erected into a distinct genus. 



14. Achatinella elongata. 



Testa sinistrorsa, acuto-turriforrai, longitudinaliter distincte striata, 

 epidermide fusca ; anfractibus septem ventricosis ; sutura profunda, sim- 

 plici ; apertura ovata ; columella plicata, ; labio simplici. 



Shell sinistral, acutely turreted, with numerous well defined 

 longitudinal strire, covered with a brown epidermis; whirls 

 seven, rounded ; suture deep, simple ; aperture ovate ; columella 

 plicate ; lip simple. 



Length 0.5 inch. Breadth 0.22 inch. 



Habitat. — Oahu. 



