510 Zoological Society, 



chology,' accompanied by the following erroneous statements : first, 

 that it is C. biradiatum of Brug. ; and second, that C. biradiatum of 

 Brug. is only a variety of the British species (C serratum), which is 

 improperly named C. Icsvigatum by him and some other authors. 

 From the apex to the ventral margin, it measures longer in propor- 

 tion than any other species. 



Cardium Elenense, Conch. Illustr. f. 58. Card, testa tenui, Icevi, 

 ovali, postice subacuminatd pallide fulvd, fusco et purpurea mi- 

 nute maculatd, intus fused ruhro fasciatd ; umbonibus inconspi- 

 cuiSf purpurea maculatis. 

 Long. 0-75; lat. 0*50; alt. 0-75 poll. 

 Hab. ad Sanctam Elenam. H. Cuming legit. 

 Very nearly resembling C. Brasilianum, but not coloured in radi- 

 ating lines, as in that species, and not so much elongated at the 

 posterior ventral margin. Found in sandy mud, at seven fathoms. 



Cardium lyratum, Conch. Illustr. f. 40. Card, testd ventricosd, 

 rotundatd, subcequilaterali, pallide fulvd, epidermide rubro-pur" 

 pured indutd, intus aured ; antice decussatim plicatd ; costis 

 numerosis ; anticis tenuissimis ; mediis validioribus ; posteriori- 

 bus distantibus, angulatis. 



Long. 1-70; lat. 1*40; alt. 1-70 poll. 



Hab. Dumaguete, ins. Negroes, Philippinarum. 



The C. JSolicum of Born (C. pectinatum, Linn., according to Brug.) 

 has a space on the posterior side of the shell entirely free from ribs 

 in either direction. Brugui^re describes it as characterised by '*trois 

 faces distinctes,*' of which the first (the posterior) is " lisse, sans cotes 

 ni stries," and the figures in Chemnitz represent the same peculia- 

 rity. In the shell before us, the whole of the posterior side is covered 

 with radiating ribs, no space being left smooth. In other respects 

 it exactly resembles the "Janus" celebrated by ancient naturalists, 

 and it is now almost as frequently met with in cabinets. The dif- 

 ference between the two species has been long observed, although 

 they have not hitherto been separately described. Mr. Cuming has 

 taken specimens of this species in sandy mud, at the depth of seven- 

 teen fathoms. 



Cardium parvum. Conch. Illustr. f. 33. Card, testd ovali, subqua- 

 dratd, postice subangulatd^ antice rotundatd, pallide fulvd, fusco 

 rubescente angulatim maculatd ; costis numerosiSf subplanulatis ; 

 sulcis angustis. 



Long. 0-50 ; lat. 0*40 ; alt. 0*43 poll. 



Hab. ? 



Cardium fornicatum, Conch. Illustr. f. 50. Card, testd subqua- 

 dratd, postice angulatd, antice rotundatd ; albd, purpureo-macu- 

 latd, intHs aurantiacd, ad margines purpureo-rufescente macu- 

 latd : costis 35, quarum anteriorum 23 biangulatis, imbricaiis, ad 

 latera m'mutissime spinoso-crenulatis. 



Long. 1- ; lat. 0-75; alt. 1' poll. 



Hab. ? Mus. F. J. Stainforth. 



A very beautiful shell, in some respects resembling C. medium. 



