96 MOLLUSCA FROM THE CRAG. 



EuLiMA,* Bisso. 1826. 

 TuEBo (spec.) Lin/t. 

 Helix (spec.) Mont. 

 Niso. Risso, 1826. 

 Phasianella. F!em. 1828. 

 Pasithea. Lea, 1833. 

 BoNELLiA. Desk. 1834. 

 PoLYPHEMOPSis (?). Portlock. 



Gen. Char. Shell elongate, subulate, smooth, and glossy ; sph'e elevated, composed 

 of numerous volutions, sometimes contorted ; apex generally acute ; aperture ovate, 

 rounded at the lower part, terminating in an acute angle above ; outer lip simple, 

 slightly obtuse, occasionally thickened, straight, or incurved ; left lip slightly reflected ; 

 columella smooth ; operculum corneous. 



The glossy exterior, subulate form, generally small and almost undefined suture, 

 vv^ith the flat volutions, will readily distinguish the shells of this genus from all others, 

 when they are in good preservation. Species of this genus are considered to have 

 existed in the earliest geological periods, but they are not at present well determined. 

 Several new and beautiful species have been found by Mr. Edwards in the Eocene 

 formations of England, and fifteen recent ones are figured by Mr. G. B. Sowerby, jun., 

 in his ' Conchological Illustrations,' some of which have been placed in a new genus 

 by Deshayes, under the name Bonellia. 



1. EuLiMA POLiTA. Liiui. Tab. XIX, fig. 1, a — b. 



TuEBO POLiTus. Linn. Syst. Nat. p. 1241, 1767. 



— L.«vis. Penn. Brit. Zool. t. 79, 1779. 



— ALBus. Don. Brit. Shells, pi. 177, 1802. 

 Helix polita. Mont. Test. Brit. p. 398, 1803. 



RissoA Boscii. Payr. Cat. des Moll. p. 112, pi. 5, fig. 15-16, 1826. 

 Phasianella polita. Flem. Brit. An. p. 301, 1828. 

 Melania Bosch. Phil. En. Moll. Sic. torn, i, p. 157, 1835. 

 EuLiMA polita. - - - torn, ii, p. 134, 1844. 



— ANGLICA. G. Sow. Conch. Hlust. fig. 5, 1838. 



— POLITA. 5. Wood. Catalogue 1842. 



— — Thorjie. Brit. Mar. Conch, p. 187, fig. 49, 1844. 



£u. Testa elongaid, lanceolafd, turritd, nitidissimd, j^olifd ; anfractibm tredecim, 

 plaiiiusculis, contlc/im ; siiturd vix didindd; aperturd ovatd, super ne acuminatd. 



Shell elongate, lanceolate, subulate, smooth, strong, and glossy, with thirteen con- 

 tiguous and flattish volutions ; suture iU defined, scarcely distinct ; outer lip nearly 



* Etym. (?) 



