CARDIUM.— Plate XVI. 



cose, attenuated towards the umbones, radiately 

 ribbed, ribs five and thirty in number, convex, 

 anterior ribs rather obsoletely latticed across with 

 small rid, ires; yellowish white, banded and spotted 

 with faint reddish brown. 



Sowerby, Pro. Zool. Soc, 1840. 



Hab. China. 



This shell is of a peculiar ghastly yellow colour. 



Species 81. (Mus. Cuming.) 



Cardium Lacunosum. Card, testd ovatd, ventricosd, in- 

 terdum subobliqud, radiatim costatd, costis quaternis 

 et triginta, lateraliter cavatis, postremis tuberculato- 

 muricatis, mediants lavibus, utrinque subtilissime cre- 

 nulalis, anticis arcnato-crenatis, costarum interstitiis 

 profunda canalieulatis ; albidd aut Jlavicante, ru- 

 bido variegatd. 



The guttered Cockle. Shell ovate, ventricose, some- 

 times rather oblique, radiately ribbed, ribs four 

 and thirty in number, laterally hollowed, extreme 

 posterior ribs armed with prickly tubercles, middle 

 ribs smooth, very finely crenulated on both sides, 

 anterior ribs arcuately crenated ; interstices be- 



tween the ribs deeply canaliculated ; whitish or 



yellowish variegated with red. 

 Reeve, Pro. Zool. Soc, 1845. 



Hah, ? 



The ribs are hollowed at the sides, in such a manner 

 that their flattened summit forms a protruding crenu- 

 lated ledge both posteriorly and anteriorly. 



Species 82. (Mus. Saul.) 



Cardium uastrum. Card, testd suborbiculari, tenuiculd, 

 radiatim costatd, costis nonis et triginta, tredecenis, 

 anticis antice muricatis, deinde duabus, interdum 

 tribus, utrinque muricatis, cajteris postice muricatis; 

 fuscescente-albd, rubido-fusco fasciatd et maculatd. 



The harrow Cockle. Shell nearly orbicular, rather 

 thin, radiately ribbed, ribs thirty-nine in number, 

 the first thirteen anterior ribs prickly on the ante- 

 rior side, then two, sometimes three, prickly on both 

 sides, the rest prickly on the posterior side ; brown- 

 ish white, banded and spotted with reddish -brown. 



Reeve, Pro. Zool. Soc, 1845. 



Ilab. ? 



The sculpture of this shell is arranged very much 



after the style of the Cardium muricatum. 



