150 PLE10CENE FOSSILS. 



sulco utr&que exteriorum costarum correlato; umbilico magno, dilato; margine exteriori 

 prominentia dentato. 



Description. Shell ovate ventncose, body whorl, with four elevated belts equi-distant; 

 spire short, with but two belts upon the volutions, the others concealed by the succeeding 

 whorls; labrum with a groove corresponding with each of the exterior ribs; umbilicus 

 large, dilated ; exterior margin prominent and dentated. 



Plate XXX. Fig. 4. Natural size. 



Locality. Pee Dee. Museum, College of Charleston. 



COLUS EXILIS. 



Plate XXX. Fig. 5. 



Fusus exilis, Con., Fos. Shells, Ter. Form., p. 17, Tab. 3, fig. 2. 



C. testa fusiform?', elongata; longitudinalibus undulantibus costis; striis convolutis, acuhs, 

 elevatis, alterna vice minoribus; rostris productis; apertura testa longitudinis dimidiam 

 cequante. 



Description. Shell fusiform, elongated, with longitudinal undulated ribs and revolving 

 stria?, acute, elevated, alternately smaller; beak produced; aperture half the length of 

 shell. 



The elongated spire, and produced 'beak distinguishes this species from C. cinereous, 

 which it resembles. 



Plate XXX. Fin, 5. 



Locality. Pee Dee. Museum, College of Charleston. 



COLUS OINEREUS. 

 Plate XXX. Fig. 6. 

 Fusus cinereus, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 236. 



C. testa fusiformi, cancellata, transverse costata; costis magnis; lineis convolutis filiformis, 



