L U C I N A 



Species lU. (Fig. ff, i, Mus. Cuming.) 



LuciNA DENTlFER.i. Liic. testd trigono-ofbiculari, con- 

 vexo-depressd, ad latera late sulcata, mhangulatd, con- 

 ceutrice lamellatd, lamelVm distantibus, termibus, erectis, 

 margine pidclierrme serratk, ad latus postictim cou- 

 spicue squamatis ; alba, epidermide tenuissimd corned 

 indutd. 



The fine-toothed Lucina. Shell triangular-orbicular, 

 couvesly depressed, broadly grooved at the sides, 

 slightly angulated, concentrically lamellated, lamelte 

 distant, thin, erect, very beautifully serrated at the 

 edge, conspicuously squamate on the posterior side ; 

 white, covered with a very thin horny epidermis. 



Jonas, Philippi, Abbild. uud Besch. Conch, vol. ii. p. 30G. 

 iKf.pl. l.f. -1. 



Hab. Suez, Eed Sea. 



Distinguished by the beautifully serrated border of the 

 laminEB, which are conspicuously developed in erect scales 

 along the posterior margin. 



Species 11. (JIus. Cuming.) 



Lucina simplex. Luc. testa orblculari, comexa, tmui- 

 culd, sub(equilaterd,postlcisubobsoletijlexuoso-aiifjiilalu, 

 C'jiicentrice regulariter creberrhne elemto-striatd, lineis 

 subtllibus radiantibus dense irregulariter sculptd ; albd. 



The simple Lucina. Shell orbicular, convex, rather 

 thin, nearly equilateral, somewhat obsoletely flexu- 

 ously angulated on the posterior side, concentrically 

 regidarly very closely elevately striated, and thickly 

 ii'regularly scratched with fine radiating lines ; white. 



Rah. North Australia ; Jukes. 



Very simply concentrically sculptured with striae after 



the manner of fine ridges, and, upon examination with the 



lens, is found to be rayed with scratches. 



Species 13. (Mus. Cuming.) 

 Lucina Cuildreni. Luc. testd subampld, elUptico-orbi- 

 cidaii, nmbones versus attenuatd, inaqidlaterd, postice 

 flexuoso-angulatd, valvd altera plana, alterd convexd, 

 deiisissime concentrice striata, striis numerosis subtilibus 

 impressis radiantibus deeussatd, cardinis dentibvs cen- 

 trcdibus duabus divaricatis prmninentibus, lateralibiis 

 callosis, subobsoletis ; intits extnsrjue albd. 



Mav 



Children's Lucina. Shell rather large, elli])tically or- 

 bicular, attenuated towards the umboes, inetiuila- 

 tcral, fiexuously angled posteriorly, one valve fiat, 

 the other convex, very thickly striated concentrically, 

 decussated with numerous fine impressed radiating 

 stricE, central teeth of the hinge two in number, pro- 

 minent, divaricate, lateral teeth callous, nearly ob- 

 solete ; white within and without. 



Gray, Zool. Journ. vol. i. p. 221. 



Hab. Brazil. 



In this fine species sometimes the right valve, sometimes 



the left is the fiat one, the opposite valve in either case 



being convex. 



Species 13. (Fig. 13 and 14, Mus. Cuming.) 

 Lucina borealis. Luc. testa suborbiculari, vix inccquila- 

 terd, solidiu.Kuld, plus minus ve)itricosd, postice obsolete 

 Jiexuoso-excavatd, aiitice subangulatd, plus minus pro- 

 ductd, subrostratd, concentrice filoso-liratd : sordide 

 albd, epidermide fuscescente indutd. 

 The northern Lucina. Shell nearly orbicular, but 

 little inequilateral, rather soKd, more or less ventri- 

 cose, obsoletely flexuously excavated on the posterior 

 side, somewhat angularly inclined, produced, and 

 subrostrate anteriorly, concentrically sculptured with 

 thread-like ridges ; dead white, covered with a 

 brownish epidermis. 

 Venus borealis, Linnaeus, Syst. Nat. 12th. edit. p. 1413. 

 Lucina borealis, Forbes and Haidey. 

 Tellina radula, Montagu. 

 Lucina radula, Lamarck. 

 Testa junior. Lucina alba, Turton. 

 Hab. Northern Europe and the British Isles. Massachu- 

 setts, United States ; Gould. Bay of Manila, Island 

 of Luzon, Philippines ; Cuming. 

 The Lucina borealis has a much wider gcograpiucal 

 range than has been hitherto supposed. The shell Fig. 13 

 represents the British state of the species, stout and 

 somewhat globose, dredged at Scarborough ; and that at 

 Fig. 14, more depressed, with the anterior side slightly 

 rostrate, is its eastern analogue, collected by Mr. Cuming 

 in the Bay of Manila, where it is not uncommon. 



