CIONELLA. 431 



from England and Stcno^yra decollata from Charleston, S. C, 

 placed in my garden at the same time, disappeared at once. 



Ociiiis CI01VELL..4, Jeffreys. 1829. 



Shell ohlong-acuminate or ovate-oblong, striated or smooth, shin- 

 ing; whorls six to seven, the last rounded ; aperture oval, equalling 

 about one half to one third the shell's length, columella short, arcu- 

 ate, more or less truncated, peristome straight, often thickened. 



Jaw slightly arched, slender, furrowed with delicate, vertical 

 striae, its concave margin scarcely denticulated. 



Lingual teeth arranged in transverse series, central tricuspid, 

 laterals bicuspid, uncini serrated. 



Cionella sub-cylindrica. 



Fig. 124. 



Shell small, oblong-ovate, obtuse, smooth and polished, transparent, brownish 

 horn color ; whorls six, rounded ; aperture small, ovate ; lip simple, thickened 

 within. 



H'-Ux snh cyUndrica. Linn.eus, Syst. cd. 12, ii. 1248 (1767), not Mont. 



Helix lubrica, Muller, Verm. Hist. i. 104 (1774). 



BuHmus luhricus, Draparnaud, Moll. 75, pi. 4, fijx- 24. — Gould, Inv. 193, fig. 124 



(1841). — Adams, Vermont Moll. 157 (1842). — De Kay, N. Y. Moll. 55, pi. 3, fig. 



43 (1843). — BiNNEY, Terr. .Moll. ii. 283, pi. 42, fig. 4. 

 Achatina lubrica, Pfeiffer, Mon. Hel. Viv. ii 272. — W. G. Binney, Terr. Moll. iv. 



1.^8. 

 Zua luhn'ca. Gray, Man. 188. — Leach, Moll. 114. — Reeve, Brit. L. and F. W. Shells, 



93 (18G3). 

 Cionellu lubrica, Jeffreys, Lin. Trans, xvi. 327. 

 Bnliinus lubricouhx, Stimp.som, Shells of New England, 54. 



Bnlimus sub<ijlin(lri<m, Moquix-Tandox, Moll. Fr. ii. .304, pi. 22, figs. 15-19. 

 Zua liihriroides. Mouse, Journ. Portl. Soc. i. 30, figs. 79, 81, 84; pi. 10, fig. 82 (1864) ; 



Am. Nat. i. 607, fig. 49 (1868). 



Shell small, rather larger than a grain of wheat, elon- Fig. 69o. 

 gated-oval, obtuse at apex, of a smoky horn color, exceed- 

 ingly thin and transparent, exhibiting the pillar through- 

 out its whole length ; surface very bright and polished ; 

 whorls five or six, rounded ; suture distinct ; lower half A 

 of the last volution somewhat tapering towards the base ; 

 aperture small, ovate, not broadly rounded at base ; lip ^ '^ffcl^'"' 

 simple, thickened within, and of a claret tint, inner lip a 

 little thickened so as to give the appearance of a slight notch at 



