CARDIUM. 



Plate XVIII. 



Species 87. (Mus. Cuming.) 



Cardium FOVEOlatum. Card, testa oblongo-ovatd, com- 

 pressiuscula', radiatim costata, costis tribus et quadra- 

 gin ta, quorum post re mis suliangulatis, wuricatis, medi- 

 anis Itembus, anticis crenatis ; albidd, coat is liueis pallidc 

 luteo-fusois decussatis, aredposticd maculis nigris par- 

 vis ornatd ; intus alba, maculis pallide nigris tinctd. 



The small-pitted Cockle. Shell oblong-ovate, rather 

 compressed, radiately ribbed, ribs three and forty in 

 number, of which the extreme posterior are slightly 

 angulated and prickly, the middle smooth, and the 

 anterior crenated ; whitish, ribs crossed at intervals 

 with pale yellowish-brown lines, posterior area orna- 

 mented with small black spots ; interior white, stained 

 with pale black spots. 



Sowekby, Pro. Zool. Soc, 1840. 



Hob. Swan River. 



The black spots which are faintly seen in the interior of 



each valve are still more faintly perceptible on the outside ; 



looking as if they were concealed between the inner and 



outer layers of the shell. 



Species 88. (Mus. Ilanley.) 

 Cardium unicolor. Card, testa oblongo-ovatd, umbones 

 versus subattenuatd, radiatim costata, costis octonk et 

 quadraginta rotundatis lavibus, anticis subtilissime cre- 

 nulatis ; albidd, purpurea obscure maculatd, intus pal- 

 lide rosacea. 

 The unicoloured Cockle. Shell oblong-ovate, some- 

 what attenuated towards the umbones, radiately 

 ribbed, ribs eight and forty in number, rounded, 

 smooth, the anterior very finely cremdated ; whitish, 

 very obscurely spotted with purple, interior tinged 

 with pink. 

 Sowerby, Pro. Zool. Soc., 1840. 



Hab. Island of Tieao, Philippines (found in sandy mud at 

 low water) ; Cuming. 

 The ribs of this species are very numerous considering 

 the distinctness with which they are developed; and the 

 interior of the shell is characteristically tinged in the inte- 

 rior with rose pink. 



Species 89. (Mus. Hanley.) 



Cardium radiatum. Card, testa subquadrato-oratd, ra- 

 diatim subobscure costata, costis duabus et quinquaginta, 

 prope ad umbones free obsoletis ; incarnato-alMcante, 

 fuscescente pallide concentrice fasciatd, radio lato pur- 

 purea conspicuo ail utremque umbonem intus exlusque 

 tinctd. 



The radiated Cockle. Shell somewhat squarely ovate, 

 radiately rather obscurely ribbed, ribs two and fifty 

 in number, nearly obsolete at the umbones ; fleshy 

 white, concentrically banded with pale brown, stained 

 within and without at each umbone with a conspi- 

 cuous purple ray. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. ? 



This species has been probably confounded hitherto with 



the Cardium tenuicostatum, from which it differs somewhat 



in form, besides being of a more solid structure. 



Species 90. (Mus. Cuming.) 

 Cardium Asiaticum. Card, testa globosd, tenuiculd, ra- 

 diatim costata, costis septenis cf triifmta, aiigustis ele- 

 vatiusculis, circa umbones Iambus, margines versus 

 posticis lamelliferis, cirteris puuetis solicits eminentibus 

 copiosis peculiariter asperatis; incamato-lacted, cosla- 

 rum inters! iliis j'crrinjuico-fusccsccntibus, intus albidd, 

 conspicue sulcata, manjiiiihus /ms/remis roseo-purpureis. 



The Asiatic Cockle. Shell globose, rather thin, radi- 

 ately ribbed, ribs seven and thirty in number, narrow, 

 rather elevated, smooth round about the umbones, 

 towards the margins the posterior lamelliferous, the 

 rest peculiarly roughened with a profusion of sobd 

 raised dots ; fleshy cream colour, interstices between 

 the ribs pale rusty brown, interior white, conspicu- 

 ously grooved, extreme posterior edges rose purple. 



Bruguiere, Enc. Meth. vers., vol. i. p. 124. 



Hab. China. 



This interesting species is singularly characterized by the 



roughened surface of the middle and anterior ribs. It may 



also be easily distinguished from the following species by 



its orbicular form, and by the posterior ribs only being 



lamellated. 



March 1845 



