LUCINA.— Plate 11. 



cotieentrice mbtiliter el densissims striata, cardine 

 edentuh ; semipellucido-albu, intus rufescente-croced. 



The toothless Lucina. Shell orbicular, rather thin, 

 ventricose, superficially excavated from the umboes 

 on both sides, concentrically finely and very thickly 

 striated, hinge toothless; semitransparent white, 

 reddish-safl'rou in the interior. 



Venus edetiUtla, Chemnitz, Conch. Cab. vol. vii. p. 34. pi. to. 

 pi. f. 427-9. 

 Lucina edentida, Lamarck. 



Hab. Jamaica. 



Similarly coloured in the interior to L. Jariiaicemis, from 

 which it differs in being of a rounder and more ventricose 

 form. The sculpture consists merely of crowded concen- 

 tric striae. 



The name Venus edentula originated with Linnaeus, but 

 it is impossible to determine what species the description 

 was intended to refer to. Dr. Philippi thinks that the 

 species represented at PI. V. Pig. 23, is the Linnaean V. 

 edentula, but it does not appear so to me, 



