LUCINA.— Plate Vlll. 



Species 1.6. (Mus. Cuming.) 



LuciNA MURICATA. htc. testtt orMculari, coavexd, sub- 

 Pectin iformi, ad later a subexcavatd, liris radiantibus 

 el concentricis undique creberrime cancellalis, liris ad 

 latera disiantioribus ei inwicalis ; aUiidd, inlerdum 

 ferrugineo patlide liiwld. 



The prickly Lucina. Shell orbicular, convex, some- 

 what Pecten-shaped, slightly excavated at the sides, 

 very closely cancellated throughout with radiating 

 and concentric ridges, which are more distant from 

 each other at the sides, and prickly ; white, some- 

 times faintly tinged with rust. 



Telliua nmricata, Chemnitz, Conch. Cab. vol. xi. pi. li)!). 

 f 1945, 6. 



Hab. Tumbez, Peru (in soft mud at a deptli of eleven 

 fathoms) ; Cuming. 

 Distinguished from the preceding by its concentric 



sculpture, and prickly, rather than scaly, ridges. 



intervals the margin of the shell, and which 

 prominent on the posterior side. 



Species 47. (ilus. Cuming.) 



Lucina divakicata. Luc. lestd orbiculnri, s/tbr/lobosd, 

 IfBvigatd, bifariam sidcato-striatd, striia atitc innHiim, 

 regulariler divaricald, marginibus iiicmncnli dcilicii- 

 latis, prtBcipue ad latiis posticiim ; peUncido-dlud. 



The divaricate Lucina. Shell orbicular, somewhat 

 globose, smooth, groove-striated in two ways, striae 

 regularly divaricate from before the midtUe, edges of 

 growth denticulated, especially on the posterior side ; 

 transparent white. 



TclUiin divancala, Linnaeus, Syst. Nat. I'^thedit. p. 1120. 

 Lw'inu divaricata, Lamarck. 

 Telliua dentala. Wood. 



Hab. West ladies. Cape York, North Australia ; Jukes. 

 Mainly distinguished from the allied species wiiich 



follow, by the denticulated borders, which have formed at 



Species 48. (Mus. Cuming.) 



Lucina ornata. Luc. lestd suborbiculari, gibbosd, anlice 

 subobliqite inclinatd, bifariam sulcato-striatd, striis 

 ante medium regulariler divaricaiis, marginibus incre- 

 ineidi subobtim deidicnlatis, pracipue ad latus ymti- 

 cim ; semipeUiicido-albd. 



Thi; ornamented Lucina. Shell nearly orbicular, 

 gibbous, rather obliquely inclined on tlie anterior 

 side, groove-striated in two ways, striae regularly 

 divaricate from before the middle, margins of growth 

 rather obtusely denticulated, especially on the pos- 

 terior side ; semitransparent white. 



Hab. ? 



The detail of sculpture is the same in this species as 

 in the preceding, except that the margins of growth are 

 less conspicuously denticulated ; the shell differs, how- 

 ever, materially in form, beiug inclined obliquely on the 

 anterior side, whilst it is uniformly of smaller size. 



Species 49. (Mus. Cuming.) 



LiriNA eburnea. Luc. testa orbiculari,globoso-cunvexd, 

 solidiusculd, bifariam sulcato-striatd, striis ante me- 

 dium regidai'iter divaricatis ; pellucido-albd. 



The ivory Lucina. Shell orbicular, globosely convex, 

 rather solid, groove-striated in two ways, strite regu- 

 larly divaricate before the middle ; transparent wliite. 



Hab. St. Elena, West Columbia and Panama (in sandy 

 mud at a depth of eleven fathoms) ; Cuming. 

 !More globose in form than the two preceding species, 



with the divaricating grooves rather more distant from 



each other, more circularly disposed at the sides, and not 



denticulated at the margin. 



