DESCRIPTION. 139 



PLATE VII. 

 Fig. 1 . Hinge of Venus concentrica. 



Fig. 2. Venus Paphia, 



Shell subcordate, with thickened transverse wrin- 

 kles which are attenuated towards the anterior 

 slope, lips complicated. 



Lister Conch, t. 279. 



Specimen white with interrupted brown rays, 

 spots, and lines; areola cordate, brown ; transverse 

 ribs broad and convex. 



It has been considered a needless increase of sec- 

 tions to separate, £is in Gmelin's edition of Lin- 

 naeus's '^Systema,^' those shells which are said to 

 be muricate before, from those which are not so, 

 possessing a general subcordate form. There is in 

 fact but one muricated species, V. Dione ; V. Pa- 

 pkia is included in the same division, which has no 

 more title to the distinction than many individuals 

 decidedly ^'unarmed;" the margin of the area, as 

 is evident in the figure, being wrinkled and not 

 muricate. 



Fig. 3. V. edenlula. 



