PLEIOCENE FOSSILS. 47 



PECTUNCULUS.— Lam. 



PECTUNCULUS SUBOVATUS.— Con. 

 Plate XVII. Fig. 1. 



Pectunculus subovatus, Con., Jour. Ac. Nat. Sci., Vol. 4, p. 140. 

 Pectunculus subovatus, Con., Foss. Shells, Ter. For., p. 17, tab. 2, fig. 3. 

 Pectunculus subovatus, Con., Foss. Ter. For. p. 62, pi. 34, fig. 1. 



P. testa subovata, compressa, subequilaterali; costis depressis, distantibus; interstitiis 

 convexis; latere palliali concentrice sublamelloso; area ligamenti ampliori, striata; umbonibus 

 incurvis. 



Description. Shell subovate, compressed nearly equilateral; ribs flattened, distant; 

 interstices convex; pallial margin concentrically somewhat lamellose; ligament area 

 rather wide, striate. 



On the buccal side the ribs are more prominent, and impressed by a radiating line, and 

 towards the anal and pallial margin they become almost obsolete in full-grown specimens. 

 The teeth are regularly V shaped, and increase in size towards the beaks. Beaks small 

 and but slightly prominent. Ligament area moderately wide and marked by divaricating 

 lines; in the young stage the margin is crenated, but this almost disappears with age. 



A very common specimen in the Meiocene of Virginia. 



Plate XVII. Fig. 1, Exterior left valve; interior, hinge and teeth of right valve. 



Locality. Darlington. 



Museum, College of Charleston. 

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