140 Original Desaiptions of Achatinella. 



subsequans; sutura marginata; columella subplicata ; apertura parum ob- 

 liqua, semiovalis, basi subangulata; peristoma simplex, margine columellari 

 superne dilatato, adnato. Alt. 25, diam. max. 7.5 mm., apert. alt. 7.5, lat. 

 4 mm. 



Shell sinistral, narrowly perforate, elongate-fusiform, solid, 

 ashy-brovvu, elegantly colored with shining brown striae or stripes; 

 spire slender, apex obtuse, smooth whorls 61-2, somewhat flat, the 

 last nearly equal to 1-2 of the length; suture marginate; colu- 

 mella subplicate; aperture hardly oblique, semioval, subangulated 

 at the base; lip simple, dilated above the margin of the columella, 

 adnate. 



Hab. Molokai mountains. 



This species is said to be larger and more solid than A. phil- 

 ippiana Pfr., and of a lighter color. 



PLICATA GROUP. 



230. Achatinella plicata Mighels. 



A. plicata Migh. Rve. Icon. Conch. London, 1850, pi. vi, fig. 44. 



Shell accumiuately turreted, slender, rather thin, sinistral, 

 whorls six in number, convex, sculptured throughout with numer- 

 ous sharp spiral keels, sutures rather excavated, columella callous, 

 plait obsolete, aperture small, lip simple; brownish-white, obscure- 

 ly waved at the apex. 



Hab. Kalae.— Bald. 



231. Achatinella gemma Pfeiffer. 



A. (newcombia) gemma Pfr. P. Zool. Soc. London, 1858, p. 22. 



T. subimperforata, sinistrorsa, oblongo-turrita, solidiuscula, striatula et 

 spiraliter lirata (liris planiusculis, conferte sulcatis), alba; spira turrita, 

 apice acutiuscula; sutura subrnargiuata; anfr. 7, superi plani, obsolete fusco, 

 variegati, sequentes conyexiusculi, ultimus 2-5 longitudinis subsequans- 

 medio lira acutiore subcarinatus; columella leviter plicata; apertura parum 

 obliqua, obauriformis; perist. subsimplex, margine columellari subreflexo, 

 externo expansiusculo. Long. 17, diam. 6 1-2 mill.; ap. 7 mill., long 3 lata. 



B. Fulvo-lutescens, anfractibus superis saturato corneo-strigatus. 



Shell subimperf orate, sinistral, oblong-turreted, somewhat 

 solid, slightly striate and spirally lirate (lirae somewhat flat, closely 

 sulcate), white; spire turreted, apex somewhat acute; suture sub- 

 marginate; whorls 7, the upper flat, obsoletely maculated with 

 brown, the following somewhat convex, the last nearly equal to 

 2-5 of the length, subcarinate at the periphery with a rather acute 



