70 POST-PLEIOCENE FOSSILS. 



lip acute, undulated ; the deep spiral grooves across the ribs of the middle- whorls give 

 the shell a tuberculated character ; the ribs do not extend below the middle of the body- 

 whorl; aperture semilunar; beak short, slightly recurved; canal wide. 



Plate XI. Fig. 10, Shell, natural size. 

 10a, Magnified view. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



PUSUS RUDIS.— (Mew Species. ) 

 Plate XI. Pigs. 11, 11a. 



Description. Shell minute, costate; whorls angular, spirally grooved, and with about 

 ten prominent and widely separated longitudinal ribs, which are widest at the periphery 

 of the whorl, and gradually contracting above and below. The spiral grooves, which are 

 interrupted by the ribs, are sufficiently characteristic of this little shell. 



Plate XI. Fig. 11, Natural size. 

 " 11a, Magnified. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



TE RE BR A.— Lam. 



TEREBRA D I S L C A T A .— D e K a y. 



Plate XL Pig. 12. 



Ceritheum dislocatum, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 235. 



Ceritheum dislocatum, Say, Conch. United States, ed. Binney, p. 79. 



Ceritheum dislocatum, Ravenel, Cat. Coll. Shells, p. 14. 



Terebra dislocata, Be Kay, Zool. New-York, Art. Mollusca, p. 152. 



Terebra dislocata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xx. 



Acus dislocatum, Tuomey 4- Holmes, Pleiocene Foss. So. Ca., p. 125, pi. xxvi, fig. 16. 



Terebra Carolinensis, Con., Sill. Jour., Vol. 4, p. 345. 



Description. Shell subulate, attenuated; whorls with numerous minute revolving 

 impressed lines, and prominent transverse ribs; near the summit of each whorl the 



