s()L^:telli na. 



Species l(). (Mus. Cuiiunjj;.) * 

 SoLF.TELLlNA Japonica. Sol. li'sid orbiculari-trnnsversa, 

 plano-convexd, iruequilaterali, lamgatd, pnrpurascente- 

 albd, eximie radiatd, epidermide corned fn/vo-oiivaced 

 Iranducidd indutd, latere anlico Mi rotundnto, postieo 

 brevi, oblique subactiminato-truncalo. 

 'I'll K Japan Soletellina. Shell orbicularly transverse, 

 llatly convex, inequilateral, smooth, pur]ile-whitc, de- 

 licately rayed, covered witii a transparent, fulvons- 

 olive, horny epidermis, anterior side broadly rounded, 

 posterior short, obliquely subacuminat(^ly truncated. 

 Deshayes, MS., Mus. Cuming. 

 Ilab. Japan; l>r. Siebold. 



Delicately ])urple-rayed upon a white f^ronnd, beneath 

 a cliaractcristie, transparent, shining, fulvous-olive epi- 

 dermis. 



Species 17. (Mus. Cuming.) 



Soletellina beversa. Sol. tesld oblique orbicidari, 

 tenui, peUucidd, valde ituequilalerali, Imvigatd, caru- 

 lescenie-albd, epidermide tenui corned translucidd Jla- 

 vescente-corned indutd. Mere antico brevimitw, poslico 

 oblique Me expanso, mnbobm rotundalis. 



The reversed Soletellina. Shell obliquely orbicular, 

 thin, transparent, very inequilateral, smooth, bluish- 

 white, covered with a thin, transparent, yellowish- 

 horny epidermis, anterior side very short, posterior 

 obliquely broadly expanded, l)oth rounded. 



Hnb. Malacca ; Dr. Traill. 



In this and the following species, l)oth very thin and 



horny, the sides arc, as it were, reversed, the posterior 



being much more broadly and more largely developed 



ihan the anterior. 



Species 18. (Mus. Cuming.) 



Soletellina oiibiculata. Sol. ledd oblique orbiculari, 

 lenui, semipellucidd, valde intequilaterali, lavigatd, ni- 

 lente, cterulescenle, epidermide corned translucidd Jla- 

 vescente-corned indutd, Mere antico brevissimo, por- 

 tico lata mboblique expanso, ambubun rotimdalis. 



TuE orbicular Soletellina. Shell obliquely orbicu- 

 lar, thin, semitransparent, very incciuilatcral, smooth, 

 shining, bluish-white, covered with a yellowish-olive, 

 transparent, horny epidermis, anterior side very short, 

 posterior side broad, rather obliquely e,xpanded, both 

 rounded. 



Solen orbicuMus, Wood, Index Testaceologicus, Supp. p. 3. 

 pi. i. f. 4. 



Hab. Sumatra; Captain Adolphe Martin. 



This species scarcely differs from the preceding, yet it 



is scarcely so obbquely expanded, and the diU'erencc, 



though slight, is characteristic. 



Specie? Ul. (Mus. Cinning.) 



Soletellina Ndttallii. So/. Icstd oblique orrdd, nub- 

 (/■qnilatei-ali, inaqnivalvi, valvd dextrd pluniore, l.(evi- 

 (jal.d, ad mnrginem poiiticnm denni' Hriatd, albidd, pw- 

 purascmte exmu- lim-lii. <i<,slir? Wimdhiln, qtidermid^ 

 corned fuhu-olimrra i„ll„r„l,.-.,,l,;,!r imhild. Mere 

 (iHticn rotun-dali), poshi-n bn-ri, (i/itiq/'r iriiiicnu). 



Nuttall's Soletellina. Shell obliquely ovate, nearly 

 e(pnlateral, inequivalve, right valve the flatter, smooth, 

 densely striated at the posterior margin, white, deli- 

 cately tinged with purple, two-rayed posteriorally, co- 

 vered with a transparent, shining, fulvous-olive, honiy 

 epidermis, anterior side rounded, posterior short, oli- 

 li(picly truncated. 



Conrad, Journ. Acad. Nat. Sci. Phil- 



Hah. San Diego, California ; Nuttall. 



This very beautiful species is highly distinguished h\ 



its remarkably transparent and richly coloured horny e])i- 



dermis. 



Species 20. (Fig. a, b, Mus. Cuming.) 

 Soletellina tumens. Sol. ledd ovato-transversu, tu- 

 midd, inaquiMerali, tenui, irregulariter rugoso-stri- 

 j aid, atro-purpiired, postice hiradiatd, epidermide oU- 



] vaced tenui decidud indutd, latere antico rotundnto, 



I podico brevi, oblique subacuminatn-truncato. 



! The swollen Soletellina. Shell ovately transverse, 

 swollen, inequilateral, thin, irregularly roughly stri- 

 ated, dark purple, posteriorally two-rayed, covered 

 with a thin, deciduous, olive epidermis, anterior side 

 rounded, posterior short, obliipn^ly snb-a(uiniinntely 

 truncated. 

 Deshayes, MS., Mus. Cuming. 

 Ilah. Island of Negros, Philippines ; Cuming. 



Of light tumid growth, still characterized by the two 

 light posterior rays. 



Species 21. (Mus. Cuming.) 

 Soletellina obscurata. Sol. ledd Irigono-orbiculori, 

 .wbobliqmi, subeequiMerali, incequivolvi, vulm dextrd 

 ■planiore, lavigatd, postice corrugata, purpureo-grited, 

 hie illic saturate fasciatd, Mere antico rotundato, pos- 

 tico breviore, oblique truncato. 

 The darkened Soletellina. Shell triangularly orbi- 

 cular, rather oblique, nearly equilateral, inequivalve, 

 right valve the flatter, smooth, wrinkled posteriorly, 

 purple-grey, here and there darker-bandeil, anterior 

 side rounded, posterior shorter, oblicpiely truncated. 

 Deshayes, MS., Mus. Cuming. 



Uab. ? 



A very characteristic species, belonging to the same pe- 

 culiar type of the genus as 5". Japonica and Nuttallii, but 

 quite distinct specifically from either. 



January, 1857. 



