PLEIOCENE FOSSILS. 3 



Description. Disk subovate, truncated posteriorly, margin thickened, ambulacral sinuses 

 wide, open ; posterior lunule large, margin thickened on the upper side ; posterior petals 

 narrow, elongated, incurved ; anterior petals ovate. 



Dimensions. Lon. 3 in., lat. 2f in., alti. f in. 



This fossil resembles very closely a recent specimen in our possession from California, 

 which is very near if not identical with E. grandis, Agass.; a species supposed to be from 

 the Antilles. In our fossil, however, the posterior edge is not emarginated, nor are the 

 open lunules so deep ; besides, the posterior lunule is wider anteriorly, and perforates the 

 disk obliquely. This, it is believed, is the first instance in which the genus Encope is 

 undoubtedly known to occur as a fossil. 



Plate I., Fig. 3. Upper sitrface not. size. 

 " 3b. Lower sun-face. 

 " 3a. Profile. 



Locality. Grove, Cooper River, S. C. 



Museum, College of Charleston. 



MELLITA.— Klein. 

 MELLITA CAROLINIANA.— Ravexel. 



Plate I. Fig. 4. 



Scutella Caroliniana, Ramenel, Jour. Ac. Nat. Sci., Vol. VIII. p. 333. 



Mellita Caroliniana, Ravenel, Catalogue of Echinidse Kecent and Fossil of South Carolina, 

 1848, p. 4. 



M. disco suborbiculari. lunulis sex; lunulis ambulacralibus minimis, ovalis ; lunula postica, 

 elongata ; petalis ovatis subclausis. 



Description. Disk suborbicular, lunules six ; ambulacral lunules small, ovate ; posterior 

 lunule long, narrow, petals ovate, nearly closed. Resembles M. Hexaphora, Lin., in general 

 appearance, but is easily distinguished from it by its having the disk more nearly orbicular, 

 and more regularly convex on the upper surface. The ambulacral lunules are also smaller 

 in M. Caroliniana, besides having a slight depression extending to the circumference from 

 each of the ambulacral lunules. The posterior lunule is nearly twice the length . of the 



