L/EVICARDll'M. 



457 



Sub-gen. fulvia, Gray. 

 Shell sub-globose, rather produced behind. 



Cumingii, Brod. 

 bullata, Linn. 



papyracea, Chem. 

 tenuieostata, Sow. 



Genus L^SVICARDITJM, Swainson. 



Shell longitudinally oval, inequilateral; surface of valves 

 simple, neither ribbed nor spinous ; hinder gape small. 



Syn. Liocardium, Morch. 



Ex. L. Norvegicum, Spengler, pi. 112, fig. 2. Shell, 

 L. Norvegicum, fig. 2, a, 2, b. 



The shells of this group are readily to be distinguished by 

 the smooth surface of the valves. The species are widely 

 distributed, being found in Europe, Africa, the West Indies, 

 America, California, and China. 



Species of Lcevicardium. 



alternatum, Soiv. 

 aurantiacum, Adams & Reeve. 

 australe, Soic. 



Beechei, Adams and Reeve. 

 biradiatum, Brug. 

 Brasilianum, Lam. 

 citrinum, Chem,. 

 elatum, Soiv. 

 Elenense, Soiv. 

 Europium, Wood. 

 fragile, Sow. 



Kalamantinum. Adams and 

 Reeve. 



lsevigatum, Linn. 

 lyratum, Sow. 

 multipunctatum, Sow 

 Norvegicum, Spengl. 

 oblougum, Chem,. 

 oviputamen, Reeve. 

 pectinatum, Linn. 

 Pennantii, Beck. 

 pulchrum, Reeve. 

 Siculum, Sow. 

 striatulum, Sow. 

 vitelliuum, Reeve, 



