Original Desc7'iptions of Achatinella. 175 



lamellar twisted tooth; color white, roseate or salmon, with traces 

 of dark brown epidermis; last whorl lighter colored than the upper 

 one. Long. 12/20, lat. 5 3/4/20 poll. 



Hab. Kula. — Newc. 



320. Achatinella gonistoma Pfeiffer. 



A goniiloma Pfr. P. Zool. Soc. London, 1855, p. 203. 



A. testa rimata, dextrorsa, turrita, solida, oblique striatula, subepider- 

 tnide decidua fulva carneo-grisea; spira eloiigato-conica, apice acuta; sutura 

 subcrenata; anfr. 8 planiusculis, penultimo convexiore, ultimo 1-3 longitu- 

 dinis vix suprante, rotundato; apertura obliqua, elliptica, utrinque angulata; 

 plica colum. subbasali, compressa, obliqua; perist. recto, basi producto, mar- 

 ginibus callo junctis, dextro intus sublabiato, columellari subdilatato, adnato. 

 Long. 16, diain. 7 2-3 mill. 



Shell perforate, dextral, turreted, solid, obliqueh' striated, 

 flesh}' gray under the deciduous, tawu}- epidermis; spire elou- 

 gately conical, apex acute; suture subcrenate; whorls 8, somewhat 

 flat, the next to the last slighth' more convex, the last slightly 

 more than 1-3 of the length, rotundate; aperture oblique, ellipti- 

 cal, angulate on both sides; columellar fold subbasal, compressed, 

 oblique; lip erect, extended at the base, the margins united by 

 a callus, the dextral margin slightly thickened within, the colu- 

 mellar margin slightly dilated, adnate. 



Hab. Kula. 



Mr. Baldwin places this with A. affinis Newc. 



321. Achatinella rustica Gulick. 



Aynastra rustica Gk. P. Zool. Soc. London, 1S73, p. S4, pL x, fig:. 17. 



Testa dextrorsa, imperforata, ovato-conica, incrementi lineis leviter stri- 

 ata, subepidermide olivacea, dilutissime rubescens; anfract. 6, conyexiusculi, 

 primi 2 fortiter, tertiusque levius sulcati; sutura simplex, parum profunda; 

 apertura par\'a, spiram nonsequans, subrubescens; perist. arcuatum, tenue; 

 columella brevis, plica inconspicua munita, labro callo pertenui juncta. 

 Long. 14 1-2, diam. 7 1-3 mill. 



Shell dextral, imperforate, ovate-conic, lightly striated with 

 lines of growth, under the olive epidermis very light reddish; 

 whorls 6, somewhat convex, the first two strong!}- and the third more 

 lightly sulcate; suture simple, hardh' deep; aperture small, not 

 equal to the spire, slightly reddish; lip curved, thin; columella 

 short, furnished with an inconspicuous fold, joined to the lip b}' a 

 very thin callus. 



Affinities. It is allied to Am. affinis Xewc, but is readily dis- 

 tinguished b}' its convex spire. 



Remarks. It is always dextral. 

 Hab. Kula. 



