178 



CO^CHYUk—DITHYRA. 40. 



rostrata. 

 3. 



NucBLA testa ovatd transvershn striata, latere antico rosfrato 



arcuato rotmidato. 

 Shell oval, striate transversely, with the anterior side produced 



curved and rounded. 

 Area rostrata. Gmelin, Syst. p. 3308. 



Turton, Linn. Syst. iv. p. 251. 

 Montagu, Suppl. p. 55, tab. 27. fig. 7. 

 Pennant, Brit. Zool. iv. p. 217. 

 Dillwyn, Descript. Catal. p. 245. 

 Turton, Conch. Diet. II. 

 Chemnitz, vii. p. 206, tab. 55, fig. 550, 551. 

 Dredged off St. Abb's head, Scotland. 



Shell half an incii long, and three quarters wide, of a glossy 

 pale horn-color, sloping from the beaks in a curved manner 

 with the extremity rounded, and along the curvature or slope h 

 a marginal angle, which is slightly reticulate. 



iiiiuuta. 

 4. 



NucuLA testd ovatd transversim striatd, latere antico rostrato 



arcuato truncato. 

 Shell oval transversely striate, with the anterior side produced 



curved and truncate. 

 Area ininuta. Gmelin, Syst. p. 3309. 



Turton, Linn. Syst. iv. p. 252. 



Pennant, Brit. Zool. iv. p. 216. 



Montagu, Test. Brit. p. 140. 



Linn. Trans, viii. p. 92. 



Turton, British Fauna^ p. 161. 



