49 



PANDORA TRILINEATA. 



Tab. XI, /g. 1. 



SPECIFIC CHARACTER. 



Shell perlaceous, concentrically wrinkled ; ante- 

 rior side very short and obtusely rounded ; posterior 

 extremity rostrated ; hinge margin concave, with two 

 approximate submarginal slightly prominent lines ; a 

 slightly impressed line passes obliquely from beak to 

 base on the anterior side of the larger valve ; teeth three 

 in each valve , the middle tooth of the larger valve a 

 mere prominent acute line ; the other teeth thick. 



SYNONYME. 



Pandora trilineata, Say, Journ. Acad. JVat. 

 Sciences, vol. 4, p. 261; American Conch, pi. 12. 



OBSERVATIONS. 



Mr. Say was the first who found this shell on the 

 coast of New Jersey, and subsequently on the southern 

 coast. I procured several specimens in the Plocene 

 strata of Virginia. The figure represents an uncom- 

 monly large specimen in the cabinet of my friend 

 Thomas Rogers. 



G 



