CIONELLA. 431 



from England and Stenogyra decoUata from Charleston, S. C, 

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



Genus C'IOXELL.4, Jeffreys. 1829. 



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

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

 a^jout 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-lix suh cylindrica. Lixx-Eus, Syst. ed. 12, ii. 124S (1767), not MoxT. 



Helix luhnca, Mcller, Verm. Hist. i. 104 (1774). 



Balimus hthricus, Draparxaud, Moll. 7.5, pi. 4, fij:. 24. — Gocld, Inr. 193, fig. 124 



(1841). — Adams, Vermont M-oll. 157 (1842). — De Kay, X. Y. Moll. 55, pi. 3, fig. 



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

 Achatina lubrica, Pfeiffer, Men. Hel. Viv. ii 272. — W. G. Bixxey, Terr. Moll. iv. 



138. 

 Ziia hihrica, Gray, Man. 188. —Leach, Moll. 114. — Reeve, Brit. L. and F. W. Shells, 



93 (1863). 

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

 Bnhnius lubncoides, Stimpsox, Shells of New England, 54. 

 Bulimus sub-cylinilrirus, Moquix-Taxdox, Moll. Fr. ii. .304, pi. 22, figs. 15-19. 

 Zua liihricoides. Morse, Joum. Portl. Soc. i. 30, figs. 79, 81, 84; pi. 10, fig. 82 (1S64) ; 



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



Shell small, rather larger than a grain of wheat, elon- 

 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 

 of the last volution somewhat tapering towards the base ; 

 aperture small, ovate, not broadly rounded at base : lip 

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

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



