793 



MONOGEAPHS OF THE GENERA 



EULIMA, NISO, LEIOSTMCA, OBELISCUS, 

 PYEAMIDELLA, AND MONOPTYGMA. 



By AETHUE ADAMS, Surgeon, E.N., F.L.S., etc. 



Genus EULIMA, Eisso. 



Tongue unarmed; tentacles simple, subulate, eyes sessile at 

 their outer bases ; mantle enclosed, with a rudimentary siphonal 

 fold ; foot linguiform, produced in front, with a bilobed mentum, 

 operculigerous lobe developed, at the sides, into even-edged, un- 

 equal expansions or lobes. 



Operculum horny, ovate, subspiral. 



Shell elongated, white, smooth, pohshed ; spire produced, many- 

 whorled, frequently with an interrupted varix on one side, apex 

 acute; aperture oval, pointed behind, inner lip reflexed over the 

 pillar ; axis imperforate ; outer Hp thickened internally. 



Syn. Pasithea, /. Lea ; Polyphemopsis, Portlock ; Balcis, Leach. 



1. EuLiMA POLiTA (pi. clxix. f. 1), Linn. (Helix), Syst. Nat. 

 ed. 12, p. 1241. Strombiformis albus, Costa. Turbo albas, Donov. 

 Turbo politus, Turt, Eissoa Boscii, Pa^r. Phasianella pohta, 

 Flem. Melania Boscii, PJdl. Eulima Anglica, Sow. Conch, Ic. 

 fig. 5. 



E. testa elongato-turrita, solida, eburnea, nitidissima ; anfracti- 

 bus angustis, planis, contiguis; apertura minima, ovata, superne 

 acuminata. 



Elongately turreted, solid, white, subopaque, polished ; whorls 

 narrow, flattened ; aperture small, ovate, acuminate posteriorly. 



British Islands, etc. (Mus. Cuming.) 



2. Eulima distorta (pi. clxix. f. 6), Deshaj/es, Desc. des 

 Coq. Eoss. de Paris. Melania distorta, Phil. Moll. Sicil. vol. i. 

 p. 158. pi. 9. f. 10. 



