98 Mr. J. C. Melvill on the 



confusion. It has been placed by Mr. Edgar Smith in the 

 National Collection as Standella lyra^ Mel v., in direct 

 sequence with 8. Solandri, Gray. 



Lucina {Godakia) angela^ sp. n. 

 (PI. II. fig. 8.) 



L. testa parva, orbiculari, albo-calcarea, fere aequilaterali ; umboni- 

 bus contiguis, prominulis, margine dorsali antice paullum exea- 

 vato, deinde leniter rotundato per marginem ventralem usque ad 

 latus posticum ; superficie externa longitudinaliter teuuicostata ; 

 costis ad quinquaginta, delicate imbricatulis, oblique arcuatis, 

 conceu trice irregulariter plicata ; costis trans medium versus latus 

 anticum pulchre divarieatis, ligamento vix externo ; pagina interna 

 subpellueente, albida, nitida ; margine uudique pulchre creuulato ; 

 dentibus in utraque valva cardinalibus, simul ac lateralibus, 

 duobus ; impressione palliali conspicua, baud sinuosa. 



Alt. 8, lat. 9, diam. 4 mm. 



Hah. Gwadur, on hard sandy mud, dredged at 8 fathoms. 



Allied to L. fibula^ Ad. & Rve., and pecten^ Lam., this 

 little species differs from both in form and the character of the 

 divaricating ribs. The form is more truly orbicular and 

 almost equilateral. The umbones are prominent, contiguous, 

 and inclined anteriorly, on which side the dorsal margin is 

 slightly excavate, but soon rounds off towards the ventral 

 margin and forms an almost complete circle. The divari- 

 cating ribs are slightly beyond the centre of the surface and 

 towards the anterior side ; the total number of ribs is about 

 fifty, they are close and finely imbricate ; the shell is rudely 

 and irregularly, here and there concentrically, plaited. 

 Within, the surface is white, shining, subpellucid, the whole 

 rounded margin is finely crcnulate ; each valve possesses two 

 lateral and two cardinal teeth, and the pallial impression is 

 entire and conspicuous. The ligament appears in part con- 

 cealed by the valve-margin. 



Several examples. 



Cryptodon victonal'is, sp. n. (PI. II. figs. 9, 9 a.) 



0. testa delicata, albo-lactea, ovato-orbiculari, aequivalvi, paullum 

 inaequilaterali, undique conceutrice pulcherrime lamellata ; lamellis 

 teneris, arctis, apud umbones soepe evanidis, in numero circa 

 sexaginta; umbonibus contiguis, antice inversis, latere postico 

 lougitudiualiter obliquiplicato, antice lunula distineta ad marginem 

 serrata, excavata ; superficie sub lente hie illic pellucide punctata ; 

 dente cardinalivalvse dextriemagno, conspicuo; pagina intus lactea, 

 vix nitente, punctis pellucidis nitidis et striis longitudinalibua 

 notata ; Imea palliali completa. 



Alt. 24, lat. 24, diam. 14 (sp. maj.). 



