36 PLEIOCENE FOSSILS. 



ARC A CiELATA.— Con. 



Plate XIV., Figs. 8, 9 and 10. 



Area Ceelata, Con., Foss. Ter. For., p. 61, pi. 32, fig. 2. 



A testa elongata, sub-trajpeziformi, compressa, decussatim striata ; latere buccali rotundato ; 

 latere anali sub-carinato, angulato, oblique truncato ; umbonibus incurvis. 



Description. Shell elongated, somewhat trapeziform, compressed, decussately striate; 

 buccal side rounded ; anal side, somewhat carinated, angular, obliquely truncate ; umbones 

 incurved. 



The radiating striae are beautifully nodulous, (see mag. sec., fig. 10,) and on the anal side 

 are somewhat squamose. The concentric lines are more strongly marked on the middle 

 of the disks, and together with the radiating striae become obsolete on the umbones. 



This little species is found in the Post Pleiocene of the State, and is probably living on 

 the coast. 



Plate XIV., Fig. 8. Exterior of shell. 

 " 9. Interior of shell. 

 "10. Magnified vieio of the stria, showing nodulous ribs. 



Locality. Darlington District. 



Museum, College of Charleston. 



