L U C I N A 



Species 14. (Miis. Cuming.) 



LuciNA N()VO-Zklandic.\. Liic. festd mliglohosd, hue- 

 qiiilatern, j/on/iiv tiiiiiiih'i,rn,irriilr'irP r/trK- //■/■lyi'/m-ifi'r 

 striata, hnniU! „„lh;. ranli,,,' ,h;,Ohi,^ rmlrallbiiK ,liia- 

 lim ill ntniqurenh-i!, qminiiii imi'i n-^rlil . Iiijiild ■ iillmld, 

 i'pid«-mid<- fmcfisceiite indutd. 



I'liK New Ze.\land Lucina. Shell somewhat globose, 

 inequilateral, swollen postei'iodv, eoncentrically rudely 

 irregularly striated, no lunule, hinge with two central 

 teeth in each valve, one of which is erect and l)itid ; 

 whitish, covered witli a li>.,dit Ijrowu ei)idermis. 



llnh. New Zealand. 



The hinge of this specii's is distinguished by a central 

 tiilid tooth, characteristic of the genus Diplodoida. 



hinge with two central teeth- in each valve, one of 



which is bifid ; whitish, covered with a shiniiii: 



horny epidermis. 

 Tilth. Isle of Muerte, Bay of Guaya(|uil (in sandy nuid 



at a depth of about eleven fathoms) ; Cuming. 

 Distinguished from the preceding by a more depressiy 

 orbicidar form, which, though slight, appears to l)e cha- 

 racteristic. 



Species 51. (M us. Metcalfe.) 

 LrciN.i AlJAXriONl. Luc. testa depresso-oHiiciilnri, xidi- 

 (eqiiilatfrd, concentrice tenuistriatd, Itiuiiid miHd, nir- 

 dine denfibus ceiitralWiis diuihiis in iitrdiiiir eiilrd. 



quay 



bifida; albidd, qddi'nxide 



Ijl,; 



■"/"'-' 



Species :-'.J. (Mus. Cuming.) 



LuciNA CORNEA. Luc. tf.sld Ciirdiifdfiiii , pnnUdum ultiore 

 quam loncjd, depressiuscnld, hmiild iiiilld, concentricii 

 impresso-striatd, cardine drntihiis rrulnilihiis diiahus 

 in utrdqtie valvd, qiiarnm and hijidd .■ ulliidd. iqmhn-- 

 niide corned pallidi oUvncn! liilndi- indutd. 



I'liE HORNY Lucina. Shell (^'ardium-shapcd, a little 

 higher than long, rather depressed, no lunule, con- 

 centrically impressly striated, hinge with two central 

 teeth in each valve, one of which is bifid ; whitish, 

 covered with a light olive shining horny epidermis. 



llnh. Gulf of Nicoiya (in coarse sand at a depth of from 

 ten to thirteen fatlioms) ; CuiniuL;'. 



The first of a small group included in tiiis plate, all 

 having a bifid tooth nearly similar to that of Biplodoiitu, 

 but more especially characterized by the presence of a 

 shining horny epidermis. 



Species 50. (Mus. Cuming.) 



Lucina nitens. Luc. testa depresso-orbicidari, siib- 

 Cardliformi, postice sitboblique incluiatd, concentrice 

 impresso-striatd, lunidd uulld, cardim dentibus cen- 

 tralibus diiabns in idrdque valvd, quarimi una bifida ; 

 alhidd, epidermide cornea olivaced nitente indutd. 



The shining Lucina. Shell depressiy orbicular, some- 

 what Cardium-shaped, posteriorly rather obliquely 

 inclined, concentrically impressly striated, no lunule, 



June, 



nitente, pallide olivaci'd, pi 

 tinctd, indutd. 



AdaNSOn'.s Lucina. Shell depressiy orbicular, nearly 

 equilateral, eoncentrically finely striated, no lunule, 

 hinge with two teeth in each valve, one of which 

 is bifid ; whitish, covered with a thin shining horny 

 epidermis of a pale olive-colour, mostly rust-stained 

 about the middle. 



Le Faluu, Adanson. 



Hid). Senegal. 



Covered with the same shining horny epidermis which 



characterizes tlie two preceding sjioeies from Central 



America. 



Species 33. (Mus. llanley.) 



Lucina Saksk. Luc. testd subquadrato-orbiculuri, inn- 

 qudidi'i-d, tniuiisimd, hifiatd, postice snicafd, cuacen- 

 trici subtilissime rude striata, area Idjamenti oblonyo- 

 ovali, subexcavatd, luuuld oblongo-ovali, teviter exca- 

 vatd, cardine edcntidd ; albd. 



Sars' Lucina. Shell somewhat squarely orbicular, very 

 thin, inflated, grooved on the posterior side, con- 

 centrically very finely rudely striated, area of the 

 ligament oblong-oval, a little excavated, lunule ob- 

 long-oval, slightly excavated, hinge toothless ; white. 



Jxinns Sarsii, Loevcu, Ind. .Moll. Scandinav. 



Ilai. Sweden. 



A very thin inflated toothless shell, difl'eriiig from the 

 tumid edentulate Lucina of PI. V. by the characteristic 

 oval excavated lumde and ligamentary area. 



