PLEIOCENE FOSSILS. 115 



Description. Shell solid, conical-ovate ; umbilicus irregular, deeply grooved, and par- 

 tially or entirely covered with a callus ; aperture ovate, oblique. 



This is an abundant species, but variable in shape; in some specimens the spire is more 

 elevated than in others. In a recent state it is common along the Atlantic shores of the 

 United States, south of Nantucket. 



Plate XXV. Fig. 16. Natural size. 



Locality. Pee Dee; Goose Creek. Museum, College of Charleston. 



NATICA CAKENA. — Lam. 



Plate XXV. Figs. IT and lTa. 



Nerita canrena,. Linn, Syst. Nat., p. 1251. 



Natica canrena, Lamk, Anim. sans Vert., Vol. 8, p. 633. 



N. testa crassa; spira striis valde impressa; umbilico gibboso; columna parvo callo. 



Description. Shell thick, lines of growth on the spire deeply impressed, umbilicus 

 gibbous, pillar with a small callus. 



The deeply impressed lines of growth on the spire are quite characteristic of this species. 

 N. canrena is a rare shell in the recent state on the Carolina shores, but common on the 

 coast of Florida and the West India Islands. 



Plate XXV. Figs. 17 and 17a. 



Locality. Pee Dee and Smith's, Goose Creek. 



Museum, College of Charleston.. 



