CARDIUM. 



Plate XXI. 



Species 114. (Mus. Cuming.) 



Cardium unimaculattjm. Card, testa, lateraliter cordi- 

 formi, medio valde convexd, carinatd, carina spinoso- 

 dentatd, lateribus plano-compressis, antlco radiatim 

 su/en/o, postico radiatim planilirato, liris medio minu- 

 Usdml elato-punctatis ; aliidd, maoulis niveis opacis 

 aspersd, roseo circa lumlam posticam vivide tinctd. 



The single-spotted Cockle. Shell laterally heart- 

 shaped, very convex in the middle, keeled, keel spi- 

 nosely dentated, sides flatly compressed, anterior ra- 

 diately grooved, posterior radiately flatly ridged, 

 ridges armed down the middle with minute raised 

 dots ; whitish, sprinkled with opake snowy spots, 

 vividly stained around the posterior lunule with pink. 



Broderip and Sowerby, Pro. Zool. Soc, 1833. 



Hah. Island of Annaa, Pacific Ocean (found in coral sand 

 on the reefs) ; Cuming. 



A front view of this shell is given by Mr. Sowerby, jun., 

 in his Conch. Ulus. f. 1 * *, as the young of the Cardium 

 cardissa ; it is, however, maturely grown, and quite distinct 

 from that species ; Mr. Cuming collected it at the above 

 named locality in great abundance. 



Species 115. (Mus. Cuming.) 



Cardium ringiculum. Card, testa transverse ovatd, la- 

 teribus. hiantibus, antico brevissitno, postico ehngaio ; 

 radiatim costatd, costis quaternis quinisve, angustis, 

 rudis, subinconspicuis, anlicis subtiliter crenulatis, in- 

 t, rstitiis posticis prope margiues iiicisis ; lutescente-albd, 

 intus iuterdum postice vivide rosacea. 



The little grinning Cockle. Shell transversely ovate, 

 sides gaping, anterior very short, posterior elongated ; 

 radiately ribbed, ribs four or five and twenty in num- 

 ber, narrow, rude, rather inconspicuous, anterior ribs 

 finely crenulated, posterior interstices cut near the 

 margins ; yellowish-white, interior sometimes brightly 

 stained with rose on the posterior side. 



Sowerby, Pro. Zool. Soc., 1840. 



Hab. Islands of Nevis and St. Vincent, West Indies (found 

 in sandy mud) ; Guilding. 



There seems to be an error in the locabty quoted by- 

 Mr. Sowerby for this interesting little species. 



Fig. 116. The shell here represented proves upon fur- 

 ther examination to be a variety of the Cardium crenvMwn 

 in which the creniform wrinkles of the ribs are almost 

 obsolete. 



Species 117. (Mus. Cuming.) 



Cardium obovale. Card, testa oblongo-cordatd, obliqud, 

 gibbosd, lateribus brerissimis ; radiatim costatd, ens/is 

 duabus et viginti, laferalibus depresso-pla „ 

 postice crenulatis, viedianis rotund,/ in, «//<'■ , 

 rime orenatis, interstitiis omnibus transversim impresso- 

 cance/latis ; albidd, fuscescente uml 

 dissime tinctd. 



The oblong-oval Cockle. Shell oblong, heart-shaped, 

 oblique, gibbous, sides very short ; radiately ribbed, 

 ribs two and twenty in number, side ribs depressly 

 flattened, anterior of which are finely crenulated on 

 the posterior side, middle ribs rounded, very closely 

 crenated throughout, interstices between all the rib- 

 transversely impressly cancellated; whitish, faintly 

 tinged with brown towards the umbones. 



Broderip and Sowerby, Pro. Zool. Soc, 1833. 



Rah. Xipixapi, West Columbia, (found in sandy mud al 

 the depth of eleven fathoms) ; Cuming. 

 Of a very singular oblong form, with a peculiarity of 



sculpture, which I have not observed in any other species. 



Species 118. (Mus. Cuming.) 

 (Figure slightly magnified.) 



Cardium fasciatum. Card, testa snbqi/adrato-oratd, jus- 

 tice leviter angulaid ; radiatim costatd, cot 

 viginti, posticis subtiliter muricatis, aniie 

 squamatis; albidd, ferrugineo-fusco pattide tinctd et 

 fasciatd. 



The banded Cockle. Shell thin, somewhat squarely 

 ovate, posteriorly slightly angulated ; radiati l\ ribbed, 

 ribs six and twenty in number, the posterior finely 

 muricated, the anterior nhtu*cl\ ~r.il.-i I ; whitish, faintly 

 stained ami banded with rusty brown. 



Montagu, Test. Brit. Supp. p. 30. pi. 27. f. 6. 



llab. Britain (found on the western coast). 



A thin pellucid shell, slightly gibbous on the posterior 



side. 



March 1845. 



