242 VENUS, 



antiquated ridges : color whitish, with often a reddish tinge, 

 sometimes longitudinally radiate, and rarely marked with 

 broad crimson longitudinal stripes, but generally with irre- 

 gular streaks and blotches of a reddish-brown; inside white, 

 glossy round the margin which is plain : beaks pointed, 

 turned much to one side, beneath which is a deep heart- 

 shaped depression, generally of a pale brown or rufous co- 

 lor : diameter sometimes two inches and a half 



The young shells differ nothing in their figure or appear- 

 ance. 



Sandy coasts of England and Ireland, v. v. 



24. Venus sinuata, Lily Fcnus. 



Lister, pi 289. f, 125, and pi. 290, f. 126Gmditt, 

 p. 3285. 



Venus lincta. Dorset Cat. p. 35. pi. 1. f. 13. 



Venus lactea. Donovan, pi. 149 Linn. Tram: viii. p. 79, 



Venus exoleta, Var. Linn. Trans, viii, pi. 3. f. 2. 



Venus exoleta. Pennant, pi. 59. f. 1. 



Venus exoleta. The young sbell. Dillwyn, p. 196. 



Venus excisa. Dillwyn, p. 195. 



Venus Casina. Dillwyn, p. 1 65. 



Shell thick, convex, roundish-oval, narrowed towards 

 the beaks, from which it runs nearly straight down the car- 

 tilage side, glossy white, with sometimes a very pale yel- 

 lowish tinge towards the binge, marked with 'numerous 

 close-set very slightly raised obtuse concentric ridges, which 

 become much more rough and elevated at the bides, besides 

 frequent deeper antiquated farrows : beaks central, promi- 

 nent, curved to one-side, with adeep oval white heart-shaped 

 depression under them; inside white, glossy round the mar 

 gin which is plain : teeth strong, in one valve four, placed 

 in pairs on each side the beak and the pairs remote from 

 each, other, the outermost on the posterior side tubercular ; 

 in the other valve three, that which is placed on the ante- 

 rior side remote and cloven : .diameter an inch and a half. 



It is a much more ponderous shell than V, exoleta, more 

 convex, pvalrshaped,' and polished, always withoutcolored 

 markings, and the older ones have generally a few obscure 

 longitudinal lines. 



The history of this shell, so very common on the western 



coasts, 



