162 GO^GBYLl A— DITHYRA. 37. 



Dillwyn, Descript. Catal. p. 169, 

 Peetunculus ruber. Lister, Conch, tab. 306, fig. 139. 

 Dredged in the Firth of Forth, and Weymouth. 



Shell an inch and a quarter long, and one and a half broad, con- 

 vex, sloping to one end, with numerous close-set sharp concentric 

 ridges, of a greyish-white color with two or three purplish-brown 

 longitudinal rays ; inside white, inclining to purple towards the 

 margin: both the slopes purple. 



Its contour is much that of the Venus Gallina, but the teeth are 

 different, the margin is plain, and the slope on the anterior side is 

 not so well defined. 



exoleta. Cytherea testd orbiculo-cordatd depressd, striis transversis crebris 

 capillaceis, area lineari, areola sublamellatd. 

 Shell orbicular heart-shaped and flattish, with crowded transverse 

 capillary striae, the area linear and the areola somewhat lamellar. 

 Tab. nost. 8, fig. 7. 

 Venus exoleta. Linn. Syst. Nat. p. 1134. 

 Gmelin, Syst. p. 3284. 

 Turton, Linn. Syst. iv. p. 233. 

 Pennant, iv. p. 209, tab. 57, fig. 3. 

 Donovan, ii. tab. 42, fig. 1. 

 Montagu, Test. Brit. p. 116 

 Linn. Trans vi. tab. 17, fig. 9, 10. 

 Linn. Trans, viii. p. 87, tab. 3. fig. 1. 

 Turton, British Fauna, p. 157- 

 Dorset Catal. p. 35, tab. 8. fig. 5. 

 Dillwyn^ Descript. Catal. p. 195, j 



3. 



