CARDIUM.— Plate XVIII. 



Species 91. (Mus. Cuming.) 

 Cardium fimbriatum. Card, testa, transverse ovatd, pos- 

 tice subproducld : radiatim costatd, costis senis et tri- 

 ginta, angustk, leevibus, prope ad margines lamella 

 serratdfimbriatis ,• lotted, rosacea pattide tinctd. 

 The frilled Cockle. Shell transversely ovate, some- 

 what produced posteriorly ; radiately ribbed, ribs 

 thirty-six in number, narrow, smooth, frilled near the 

 margins with a serrated lamella ; cream colour, palely 

 tinged with pink. 

 Wood, General Conchology, p. 234. pi. 56. f. 4, 5. 

 Hab. China. 



, Lamarck has always been referred to as the author of 

 this very characteristic species, but it was first described, 

 and most accurately figured, in the year 1815, by our es- 

 teemed countryman Mr. Wood. His excellent representa- 

 tion of it, is, I believe, the only one that has been hitherto 

 published, for the shell figured under the above name by 

 Mr. Cray, in the Zoology of Beechey's Voyage, appears by 

 its orbicular form to be only a young specimen of the Car- 

 dium Asiaticum. The Cardmm fimbriatum in a young state, 

 before the development of the marginal lamella?, would 

 still be of a transverse, posteriorly produced, form. It is 

 perfectly distinct from the preceding species both in size 

 and shape, as well as in the arrangement and character of 

 its external sculpture. 



Species 92. (Mus. Cuming.) 



''aRDIUM PALLIDUM. Card, testa subquadrato-ovatd, de- 

 pressiusc.uld, postice paululnm angulato-productd ; ra- 

 diatim temicostatd, costis numerosissimis, nunc duabus 

 tribusve et quadraginta, nunc duabus tribusve et quin- 

 quaginta, lavibus subcarhucformibus ; pallida. 



The pale Cockle. Shell somewhat squarely ovate, rather 

 depressed, posteriorly a little angularly produced ; 

 radiately finely ribbed, ribs very numerous, sometimes 

 two or three and forty, so metimes two or three and 

 fifty in number, smooth, somewhat keel-shaped ; pale. 



Keeve, Pro. Zool. Soe., 1845. 



Hab. Bay of Manila (found in sandy mud at a depth of 

 from four to five fathoms) ; Cuming. 



This is another species which has been probably eon- 

 founded with the Cardium temucostatum, an examination 

 of several specimens assures me, however, that it is di- 

 stinct. It is more depressed, has not the sbghtest indi- 

 cation of the waved flesh-colour spots which adorn that 

 species, and is altogether different. 



Species 93. (Mus. Cuming.) 



Cardium Lamarckii. Card, testa transversa ovatd, rnbcor- 

 dutii. tenuiculd, ventrieosd, postice oblique producid ; 



radial 'mi costatd, costis duabus tribusee ct ciginti, latius- 

 culis, obtusis, in aream posticam subccanidis ; trans- 

 versim undato-striatd ; albidd, ferrugineo-fmco caru- 

 leoque rarii-gatd, uaibouibus livido-fuscis, intus, postice 

 prceeipitc, livido-fuscescente. 



Lamarck's Cockle. Shell transversely ovate, subcor- 

 date, rather thin, ventricose, posteriorly obliquely 

 produced ; radiately ribbed, ribs two or three and 

 twenty in number, rather broad, obtuse, indistinct 

 upon the posterior area ; transversely striated in a 

 waved manner ; whitish, variegated with blue and 

 rusty brown, umbones livid brown, interior livid brown 

 especially towards the posterior side. 

 Cardmm rusticum, Lamarck (not of Linnasus). 

 Cardium edule, car., Deshayes. 



Hab. Coast of Devonshire, Britain (found in the sand at 

 low water). 



This shell is the type of that extreme variety of the Car- 

 dium edule which Lamarck distinguished, after Chemnitz, 

 by the title of Cardium rusticum ; it is not, however, the 

 species which Linnaeus described under that name (for 

 which see Plate III. Sp. 16), as Lamarck himself admitted, 

 " Je n'ai pas encore reconnu le Card, rusticum de LiruieV' 



