CAEDIUM.— Plate XXI. 



Species 119. (Mus. Cuming.) 

 (Figure slightly magnified.) 



Cardium ovale. Card, testa tenui subquadrato-ovatd, de- 

 pressiusciild, postice leviter angulatd; radiatim costatd, 

 costis, anticis pracipue, obscure subtilissime muricatis ; 

 albidd,fuscescente pnllide tiuctd fit fasciatd. 



The oval Cockle. Shell thin, somewhat squarely ovate, 

 rather depressed, posteriorly slightly angulated ; radi- 

 ately ribbed, ribs, the anterior especially, obscurely 

 very finely muricated; whitish, faintly stained and 

 banded with brown. 



Sowerby, Cat. Card. Conch. Lllus., no. 24. 



Cardium elongatum, Montagu, (not of Bruguiere). 



Eab. Britain (Torbay). 



More depressed than the preceding species. 



Species 120. (Mus. Said.) 

 (Figure slightly magnified.) 



Cardium virgo. Card, testa subquadruto-cordatd, postice 

 concavo-iiinjeliilii ; radiatim costatd, costis oetonis et 

 triginta, nugnsfis, rompressis, creberrime squamosis, 

 medianis squamis ereclioribus, costarum interstitiis 

 transversim elevato-slriatis ; extus vieed, intrn san- 

 guined. 



The virgin Cockle. Shell somewhat squarely heart- 

 shaped, posteriorly concavely angulated; radiately 

 ribbed, ribs about thirty-eight in number, narrow, 

 compressed, very closely scaled, middle ribs with the 

 scales more erect, interstices between the ribs trans- 

 versely elevately striated ; pure snowy white without, 

 blood-red within. 



Reeve, Pro. Zool. Soc, 1845. 



Hah. ? 



Care should be taken not to mistake this very delicate 

 and beautiful shell for a white variety of the Cardium 

 kystrix, to which it is most nearly allied. 



Species 121. (Mus. Cuming.) 



Cardium exiguum. Card, testa oblique ovatd, gibbosd, 

 latere antico bremssimo, postico angulato; radiatim 

 costatd, costis duabus et vigiuti, obsolete tuberculatis, 

 interstitiis punctatis; albidd, ferrugineo-fusco pallide 

 tinctd. 



The little Cockle. Shell obliquely ovate, gibbous, an- 

 terior side very short, posterior angulated ; radiately 

 ribbed, ribs two and twenty in number, obsoletely 

 tuberculated, interstices between the ribs punctured ; 

 whitish, faintly tinged with rusty brown. 



Gmelin, Systema Naturae, p. 3255. no. 37. 



Hob. Britain. 



The tubercles are, in some specimens, almost obliterated. 



Species 122. (Mus. Cuming.) 



Cardium Dion;eum. Card, testa lateraliter cordijormi, 

 latere antico producto, postico plane concavo-depresso, 

 medio valde gibbosd, eariuatd, carina, spi noso-dentatd ; 

 postice radiatim. sulcata, antice radiatim. planiliratd, 

 liris mwricato-nodulosis ,• albd, area posticd maculis 

 niveis opacis fioccatd. 



Dione's Cockle. Shell laterally heart-shaped, anterior 

 side produced, posterior very flatly concavely de- 

 pressed, the middle very gibbous, keeled, keel spi- 

 nosely dentated ; posterior side radiately grooved, an- 

 terior radiately flatly ridged, ridges prickly noduled; 

 white, posterior area flaked with opake snowy spots. 



Sowerby, Zoological Journal, vol.iv. p. 367. 



Hab. Island of Annaa, Pacific Ocean (found among fine 

 coral sand at low water) ; Cuming. 

 A delicate pretty species, allied to the Cardium cardissa, 



the anterior side of which is attenuately produced, whilst 



the posterior is peculiarly flattened. 



Species 123. (Mus. Cuming.) 



Cardium hiulcum. Card, testa transverse oblongd, latere 

 antico brevi, postico elongate ; radiatim costatd, costis 

 oetonis et triginta, postremis aulieisqne muricatis ; albd, 

 roseo hie illic pallide maculatd. 



The inclosed Cockle. Shell transversely oblong, an- 

 terior side short, posterior elongated; radiately ribbed, 

 ribs eight and thirty in number, the extreme poste- 

 rior and anterior of which are muricated ; white, faintlj 

 spotted here and there with pink. 



Reeve, Pro. Zool. Soc, 1845. 



Eab. ? 



This approaches the Cardium bullatmu somewhat in form, 



but has fewer ribs and a different style of sculpture. 



