N0.1214. ^TxVCiWi.b' OF NOR'IH AMERICAN UARDUD.E—DALL. 885 



Genus CORCULUM Bolten. 



(S}'!!. Corculum Bolten, 1798; + Cardlssa Megerle, 1811; + [socar- 

 dia Oken, 1815, not of Lamarck, 1799; + Les llemicardes Ciivier, 

 1817, ex ■parte; + Ilemicard'mm Ferussac, 1822; + Jleimcjirdla 

 Morch. 1853.) Tvpo, (jirdlum cardU^a\A\\\\'^\x<'. 



Genus LUNULICARDIA Gray. 



(S}^. Lunullcardta Gray, 1853; + (}])!.socardiuvi Baylo, 1879.) 

 IVpe, Cardmra refusion Linn?eus. 



Genus AVICULARIU M Gray. 



(Syn. Avlcidarlum. Gray, 1853; + L'dkocard'uun Woodward, 1851.) 

 Section Avicularium s. s. Tj'pe, Cardiuin avicidare Lamarck. 

 Section ^?/ssoc«r6^M«^i Munier Chalmas, 1882. Type, Card 1 urn, 



emarginatwn Deshayes. 



{Pterocardia Baj^an, 1871, and Goniocardiimi Vasseur, 1880, are 

 suspiciously close to Avicidarium.) 



Genus PROTOCARDIA Beyrich. 



(Syn. Protocardia Beyrich, 1815; + Protocardium Meek and Hay- 

 den, 1860; + NemocaTdimn Meek, 187().) 



Section Protocardia s. s. Type, Card nan JiiJIa?iiun Sowerl)y. 

 Section Neniocardium Meek. Type, Carditvm semiasj^erum 

 Deshayes. 



Section Leptocardla Meek, 1876. Type, Cardiuin suhqua- 

 dratunt. 



Evans and Shumard; Cretaceous. 



Subgenus Lophocardium Fischer, 1887. Type, Cardium cunungl 

 Broderip. 



? Genus HEMIDONAX Morch. 



(Sj^n. Hemidonax Morch, 1870; + Donacieardium Vest, 1876; 

 + Donaciocardlurii von Martens, 1876.) T^'pe, Cardium donaciforirie 

 Schroeter. 



This group probably belongs with the Donacid;v\ 



EAST A3IERICAN SPECIES. 



Cardium (Trachycardium) isocardia Liniuvus, 1758. 



liange: Cape Hatteras, Xorth Carolina, to Trinidad Island. W(^st 

 Indies. Pliocene to Recent. 



This includes Card 1 win egmordianum Shuttleworth. 1856. and (_'ar- 

 ijitim (dmrioffrain Guppv. 1875. 

 Cardium (Trachycardium) muricatum Linnanis, 1758. 



Range: North Carolina to Santa Catei'ina, Brazil. RleistoctMie. 

 Proc. N. M. vol. xxiii 25 



