EBURNA 



Genus Eburna, Lamarck. 



Testa ovata vc/ ovato-conoidea, umMUcnta, umbUico amjilo, 

 infra caiKilicuJato, biienhtiii. hiipletn, spirce siiluris 

 nunc shiipliriljiis, nunc iirufiititVi- viiniiUvulatis, aperturd 

 basi e»utr(jiiiatd, plcruiuqiie stipcnii caiialiculatd, labro 

 columellari incrassato, calloso, exier/io simpUci. Opvr- 

 culmu parvmn, acuminatum. 

 Shell ovate or ovately conoid, umbilicated, umbilicus large, 

 channelled beneath, sometimes tilled up, sutures of 

 the spire simple or very deeply chanueUed, columellar 

 lip thickened, callous, outer lip simple. Opercidum 

 small, acuminated. 

 The name Eburna, signifying ivorij, is not very appro- 

 priate for the present genus, inasmuch as it was founded 

 on the polished E. glabrata of Lamarck, which proves to 

 be an AncUlaria, almost entirely enveloped by the soft 

 pai-ts, whilst the species that remain are distinguished for 

 having a dark thick epidermis. The animal, of which 

 di'awiugs have been published in the Mollusca of the 

 Voyage of the Samarang and of Le Bonite, approaches so 

 near to Buccinum, that M. Deshayes is disposed to return 

 rather to the views of Bruguiere and Linnaeus ; it wiU, 

 however, be readily acknowledged that there is a marked 

 association of generic character' in the objects under con- 

 sideration. They ai-e all largely mubilieated, the umbilicus 

 being sometimes filled up, and are devoid of sculpture. 

 The aperture is alike in all, and the colouring and pattern 

 are peculiar, very simOar throughout, yet varying in a 

 manner sufficiently constant in each species to be regarded 

 of considerable specific importance. 



It is perhaps scarcely necessary to refer to M. Kiener's 

 remarks that E. papulosa and Falentiana are varieties of 

 E. spirata, and that E. ambulacrum is a variety of E. lidosa 

 (figured as E. spirata vox.). This is a grave mistake; 

 the author is not, unfortunately, acquainted with the 

 species. It will also be found on reference to Sp. 4, that 

 the E. australis is not identical with Lamarck's CoucMaria 

 spirata as generally supposed; whQst E.plumbea is re- 

 ferred to the genus Mouoceros. 



The ElniriKV are idl inhabitants of the Eastern hemis- 

 phere. 



Species 1. (Mus. Brit.) 

 Ebukn.'v P-\pill.\ris. Eburn. testil oblongo-conoklcd, 

 imperforatil, spird elevatd, apice papillaris suturis sii/i- 



plicibus, anfraetibits subrotundatis, superne obtuse de- 

 pres.sis, vLv angulatis ; alba, f usee iindlqiie pimclald. 

 The i>.\^piLLARY Ebdrna. Shell oblong-conoid, imper- 

 forated, spire raised, papillary at the apex, sutures 

 simple, whorls somewhat rounded, obtusely depressed 

 at the upper part, scarcely angulated ; white, dotted 

 throughout with brown. 

 SowERBY, Tankerville Catalogue, App. p. xxii. 

 llab. Cape of Good Hope. 



I am only aware of four specimens of this very in- 

 teresting species ; one in the British Museum, one in the 

 Cumingian collection, one in the collection of Mr. Gaskoin, 

 and one in some continental cabinet. 



Species 3. (Mus. Cuming.) 

 Eburna lutosa. Eburn. testa ovatd, vix umbilicatd, spird 

 elevatd, acutd, anfractibus convexis, Icevibus, superne 

 obtuse depressis, vix angulatis ; albd, pallide spadiceo 

 promiscne tmdulato-nebulatd . 

 The mudby Eburna. Shell ovate, scarcely umbilicated, 

 spire raised, sharp, whorls convex, smooth, obtusely 

 depressed above, scarcely angulated ; white, promis- 

 cuously clouded in a waved manner with light fawn 

 colour. 

 Lamarck, Anim. sans vert. (Deshayes' edit.) vol. x. p. 23.5. 



Eburna Pacijicn, Swaiuson. 

 Hob. China. 



The colouring obtains a less defined pattern in this 

 species than in any other, and the whorls are more ob- 

 tusely depressly rounded at the upper part. 



Species 3. (Mus. Cimiing.) 



Eburna Japonic a. Eburn. testd ovato-conoided, umbili- 

 catd. apice sidipnpiUari, suturis simpUcibus, anfractibus 

 coiicr.vis, IrPvibus, supcrui' vix depressis ; albidd, macu- 

 lis seniihriiarihii.s rrl oblouyis fnlri)-spadiceis, confertis, 

 hiserititiui ,-i,i,-l,i, iii/i-rs/iliis inacidis parvis numerosis, 

 diayi)ti'iliti-r JisihlsiUs, uotalis. 



The Japan Eburna. Shell ovately conoid, umbilicated, 

 somewhat papillary at the apex, sutures simple, 

 whorls convex, smooth, very slightly depressed at 

 the upper part ; whitish, encircled with two rows of 

 close-set semilunar or oblong fulvous bay spots, the 

 interstices between which are marked with Mumerou- 

 small spots ranging diagouidly. 



