96 MOLLUSCA FROM THE CRAG. 



The texture of this shell, as well as of the preceding species, is opaque and 

 fragile, differing in composition from the true Scalarise. 



Eulima * Bisso, 1826. 

 Turbo (spec.) Linn. 

 Helix (spec.) Mont. 

 Niso. Risso, 1826. 

 Phasianella. Flem. 1828. 

 Pasithea. Lea, 1833. 

 Bonellia. Desk. 1834. 

 Polyphemopsts (?). Portlock. 



Gen. Char. Shell elongate, subulate, smooth, and glossy ; spire elevated, com- 

 posed 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, 

 with 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. Linn. Tab. XIX, fig. 1, a — b. 



Turbo politus. Linn. Syst. Nat. p. 1241, 1/67. 



— LjEVIS. Penn. Brit. Zool. t. 79, 1779. 



— albus. Bon. Brit. Shells, pi. 177, 1802. 

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



Rissoa Boscn. 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, 1814. 



— anglica. G. Sow. Conch. Illust. fig. 5, 1838. 



— polita. S. Wood. Catalogue 1842. 



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



Eii. Testa ehngatd, lanceolatd, turritd, nitidissimdy polita ; a?ifractibus tredecim, 

 planiusculis, contiguis ; suturd vice distinctd; aperturd ovatd, superne acuminata. 



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

 contiguous and flattish volutions ; suture ill defined, scarcely distinct ; outer lip nearly 



* Etyrn. (?) 



