PECTUNCULUS.— Plate II. 



sulcis distantibus, fere obsoletis ; lunula ovatd, sub- 

 fused. 



The violaceous Pectuncdlus. Shell orbicularly heart- 

 shaped, swollen, ashy violet-colour, longitudinally 

 grooved ; grooves distant, very faint, almost obso- 

 lete ; lunule ovate, brownish. 



Lamarck, Auim. sans vert., vol. vi. p. 493. 



Paybandeau, Cat. Moll, de Corse, pi. 2. f. 1. 



Testa fossilis. 



Pectunculus tra?isversus ?, Lamarck. 



Area insubrica ?, Brocchi. 

 Hab. Coast of Sicily. 



I have followed Lamarck in describing this shell to 

 be longitudinally grooved ; the character alluded to is, 

 however, very feebly developed. 



