84 



Tliis species resembles Card. medium in its generai form and ap- 

 pearance, but may easily be distinguisbed by a caref ui attention to 

 the above cbaracteis. — G. B. S. 



Cardiom obovale. Card. testd obovali, altiore qudm loitg'i, 

 nlbd, lateribus brevissimis, antico paulo longiore ; medio ex um- 

 bone ad marginėm injeram r otundato-carinato ; costis radiantibiif: 

 12 , lateralibiis depressiusculis, anticis postice crenulatis, mediams 

 superne transversim rugosis, interstitiis omnibus transversim stri- 

 atis ; denfe laterali antico ad cardinem propius admolo : long. 

 0-55, Int. 55, alt. 0-8 poli. 

 Hab. ad oras America; Meridionalis. (Xipixapi.) 

 Found in sandy mud at eleven fathoms depth. 

 A species very remnrkable for the peculiarity of its generai form; 

 its length and breadth being equal, and its heigbt much greater. — 

 G. B. S. 



Cardium elatum. Card. testu ovali, obliqud, larvignf i, venlri- 

 cosi&simu , Jlava ; sukis radiantibus plurimis, mediayiir,, prater 

 posticis, oksoletis ; ared laterali, posticu, anticugve Icevibus, mar- 

 ginibus edeutulis ; marginibus ventralibus dentatis ; epidermidc 

 tenui : long 4.-, Int. 3 5, alt. 4--5 poli. 

 Hab. ad Guaymas in Sinu Californiensf. 

 Foiind in sandy mud at low \vater. 



This is the largest species of Carditiyn \Thich I am acquainted 

 with, its dimensions sometimes fnr exceeding.those given above. 

 It belongs to the šame group in the genus as Card. lavigatuAi, Card. 

 serratum, Card. snkatum, &c. — G. B. S. 



Cardium senticosl'm. Card. testd suborhicuhiri , compressimcul!, 

 albidd, purpitrascenli-Jusco variegatd ; cosiis radiantibus 39 — 40, 

 tredecim anticis antice graniferis ; demnm 2 — 3 uiringue gra- 

 nįferis ; religuis postice anguJatis, graniferis, granis obligin's, 

 posterioribiis majoribus ; interstitiis omnibus angu.stis, transver- 

 sim striatis; latere postico ringente,dentibiis marąiuai'ibus validii., 

 purpurascentibiis.' long. 15, laf. l'l, att. 1-5 peni. ^ 



/y^A. ad Sanctam Elenam, A mericne Meridionalis. * 



Found in sandy mud at from six to tvvelve fathoms depth. 

 Very liko Card. muricatum, but diftering from it in being orbi- 

 cular, in having more ribs, and in the form of the little grains upou 

 the ribs.— G. B. S. 



Cardium multipunctatum. Card. testd ovali, obliųun', depres- 

 siusculd,l(Evi, poUtd , roseo-J'ulvd, maculis punctisque plurimis satu- 

 ratioribus ; striis radiantibus confertissimis ; margine posticd dor- 

 sali subangulntd : long. 1-3, lat. ()-S, alt. \-5 poU. 

 Hab. ad littora Chinse. 



Only two s])ccimens of this rare and beautiful species are in Mr. 

 Cuming's collection. — G. B. S. 



Cardium unimaculatum. Card, testd cordiformi,albdymaculd 

 santrin'ned posticd ; valvis valde convexis, carinatis, carind den- 

 tatd ; L-iIcre antico productiore, tumidiusculo ; latitudine O 55 

 lotigitudinem duplo superante, alt 0*6 poli. 



