154 



GO^GRYLIA—DITHYRA. 36. 



simiosa. 

 JG. 



Venus testa ovato-orbiculari, sinu lonc/itudinali ah umbonibus, stru.y 



transversis planatis longitudinalibusque obsoletis. 

 Shell roundish-oval, with a longitudinal sinuosity from the beaks, 

 and flat transverse striae and obscure longitudinal ones. 

 Tab. nost. 10, fig. 9. 

 Venus sinuosa. Pennant, iv. p. 213, tab. 58, fig. 4. 

 Turton, Linn. Syst. iv. p. 227. 

 Montagu, Test. Brit. p. 120. 

 Linn. Trans, viii. p. 90. 

 Turton, British Fauna, p. 158. 

 Turton, Conch. Diet. p. 248. 

 Mus. nost. From Dublin bay. 



Shell five eighths of an inch long, and about as much broad, 

 rounded at both the sides, but much longer or deeper at the anterior 

 one, and produced at the other, with a rather oblique indenture from 

 the beaks to the margin which is a little irregular : beaks nearly 

 central, with a heart-shaj^ed slightly carinate areola under them ; 

 inside rich glossy yellow : in one valve two of the teeth are cloven, 

 and one in the other. 



This singular shell seems nearest to approach to the Venus vir- 

 ginea, but the transverse striae are crossed by fine longitudinal ones. 

 From Venus decussata, and V. Pullastra it differs, in not having the 

 striae more strongly decussate at the anterior side : and from the 

 Venerupis perforans in the teeth being exactly characteristic of it.s 

 genus, and not erect and parallel. 



aurea. 

 17. 



Venus testa ovato-cordatd, lateribus declivis, medio tumido, strils 

 transversis crebris longitudinalibusque obsoletis, dente medio Jisso. 



