CARDIUM.— Plate XXII. 



Reeve, Pro. Zool. Soc, 1845. 



Hah. ? 



The chief peculiarities of this shell are its flattened ribs, 

 the interstices between which are narrowly aud deeply cut, 

 and its posterior concavity. 



Species 130. (Mus. Cuming.) 

 Caedium pinnulatum. Card, testa ovatd, subobliqttd, 

 radiatim costatd, costis seiiis et viginli, squamis brevi- 

 bus obtusis numerosis irregulariter sculptis, costis pos- 

 ticus eminentioribus ; albicante. 

 The feathered Cockle. Shell ovate, rather oblique, 

 radiately ribbed, ribs six and twenty in number, irre- 

 gularly sculptured with numerous short obtuse scales, 

 posterior ribs the more conspicuous ; whitish. 

 Conrad, Journ. Acad. Nat. Sci. Phil., vol. vii. 



Hah. ? 



Although some doubt has been attached to the value of 

 this species, the shell here represented, which has been 

 handed to me for it on good authority, is certainly distinct 

 from any of the small Cardia that I have had an opportu- 

 nity of examining. 



Species 131. (Mus. Taylor.) 



Caedium boreale. Card, testa suitramverse ovatd, ra- 

 diatim subti liter sulcata, sulci* mediaiiis anticisque ob- 

 soletis ; albidd, Unci* trigonis fuscescentibus exilissime 

 pictd, epidermide tenui prope margines indutd. 



The northern Cockle. Shell somewhat transversely 

 ovate, radiately finely grooved, middle and anterior 

 grooves obsolete ; whitish, very faintly painted with 

 pale brown triangular lines, covered near the margins 

 with a thin epidermis. 



Reeve, Pro. Zool. Soc, 1845. 



Hah. Greenland. 



The anterior portion of this little shell is comparatively 

 smooth, whilst the posterior is distinctly grooved. I have 

 not seen any other specimen. 



132. (Mus. Cuming.) 



Cardium Suediense. Card, testa minuta, orbicidari, 

 tenui, fragili, radiatim costatd, costis octonis et mginti, 

 convexis, muricatis ; alba, epidermide tenui stramined 

 indutd. 



The Swedish Cockle. Shell minute, orbicular, thin, 

 fragile, radiately ribbed, ribs eight and twenty in 

 number, convex, prickly ; white, covered with a thin 

 straw-coloured epidernns. 



Reeve, Pro. Zool. Soc, 1845. 



Hob. West coast of Sweden. 



This is the smallest species of Cardium I have met with ; 

 it is not much unlike the figure of an odd valve discovered 

 by M. Pliilippi, at Palermo, and figured in his second vo- 

 lume of the Enum. Moll. Sicilian, pi. 14. f. 18, under the 

 name of C. minimum ; his description, however, by no 

 means agrees with the northern species under considera- 

 tion. 



Species 133. (Mus. C uming .) 

 Cardium arcuatum. Card, testa ovatd, tenui, subpellu- 

 cidd, radiatim costatd, costis plano-convexk, squamis 

 obtusis arcuatis irregulariter sculptis ; albidd. 

 The arched Cockle. Shell ovate, thin, somewhat trans- 

 parent, radiately ribbed, ribs flatly convex, irregularly 

 sculptured with obtuse arched scales; whitish. 

 Montagu, Testacea Britannica, p. 85. pi. 3. f. 2. 

 Ilab. Falmouth Harbour, Britain. 



A very thin, fragile shell, in which the scales are un- 

 usually numerous and obtuse, having almost the appearance 

 of raised stria?. 



Note.— Since the publication of the Caedium eusticum in October last, my views in regard to that species (according to the example 

 of Poli, but in opposition to that of Chemnitz, Lamarck, Sowerby and others) have been singularly confirmed by an incident to which I attach 

 considerable importance. Upon lookiug over the shells formerly belonging to Linnaras, in the Museum of the Linnrcan Society of London, 1 

 have had the pleasure of finding the very shell from which the great Professor of Upsal probably described the species in question; it has, at 

 all events, the figures "91 " very legibly written upon the inside of one of the valves, in his own handwriting, referring to the i'ikuh u 

 kusticum of the 'Systema Naturfe,' 12th edition. 



M. Deshayes will no doubt he pleased to hear that an odd valve of the Caedium seeeatum also, such as I have published it, is still 

 presi I.. A in the same collection, marked " 8G " in Linnams' handwriting, referring in like manner to the 12th edition of the ' Syst. Xat. _L. K. 



