Original Descriptions 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. Ivong. 12/20, lat. 5 3/4/20 poll. 



Hab. Kula. — Newc. 



320. Achatinella gonistoma Pfeiffer. 



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



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

 rnide decidua fulva carneo-grisea; spira elongato-conica, apice acuta; sutura 

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

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

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

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

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



Shell perforate, dextral, turreted, solid, obliquely striated, 

 flesh}- gray under the deciduous, tawny epidermis ; spire elon- 

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

 flat, the next to the last slightly 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. 



Amastra rustica Gk. P. Zool. Soc. London, 1873, p. S4, pi. x, fig. 17. 



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

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

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

 apertura parva, spiram nonaequans, 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 strongly and the third more 

 lightly sulcate; suture simple, hardly deep; aperture small, not 

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

 short, furnished with an inconspicuous fold, joined to the lip by a 

 very thin callus. 



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

 tinguished by its convex spire. 



Remarks. It is always dextral. 

 Hab. Kula. 



