L U C I N I D M . 27 



Genus, LUCINA.— Brug. 



LUCINA DIVARICATA. 

 Plate VI. Fig. 1. 



Tellina divaricata, Linn., Syst. Nat., 1120. 



Lucina divaricata, Lam., An. sans Vert., Vol. 4, p. 541. 



Lncina divaricata, Con., Foss. Ter. For., p. 39, pi. 20, fig. 3. 



Lucina divaricata, Ravenel, Cat. Coll. Shells, p. 4. 



Lucina divaricata, Gould, Invert. Mass., p. 70. 



Lucina divaricata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xxi. 



Lucina divaricata, Tuomey &? Holmes, Pleiocene Foss. So. Ca., p. 59, pi. 18, figs. 10 and 12. 



Lucina strigilia, Stimpson, Shells New-England, p. 17. 



Strigilla divaricata, Turton, Test. Brit., p. 119. 



Description. Shell orbicular, somewhat globose, thin, groove-striated in two directions; 

 stria? divaricate. This pretty species is easily distinguished from its congeners, by the 

 regular outline and sharply cut divaricating stria?. 



It is difficult to believe a species to have so wide a distribution, both horizontally and 

 vertically, as this is said to have. It occurs in the Eocene of Europe, in the Meiocene of 

 Virginia, in South-Carolina in both Pleiocene and Post-Pleiocene, and belongs to the 

 living fauna of our entire coast. — T. $ H 



It is very possible that several species are included under this specific name. 



Plate VI. Fig. 1, Exterior of left valve. 



Locality. Simmons'. Museum, College of Charleston. 



LUCINA COSTATA. 

 Plate VI. Fig. 2. 



Lucina costata, Tuomey $ Holmes, Pleiocene Foss. So. Ca., p. 60, pi. 18, figs. 12 and 13. 



Description. Shell orbicular, thick, compressed, radiately ribbed, concentrically 

 striate, and towards the pallial margin somewhat sulcate. 



This fossil is readily distinguished from the small lucinid^e which it resembles, by the 

 prominent rounded ribs. 



