130 



■marked with brown, or blueifli-black, zigzag lines-, or 

 mottled with cinereous; others are plain brown, frequent- 

 ly of a yellowifli tinge, and fometimes deep ferruginous 

 about the umbo : in molt there are a few llreaks at the an- 

 terior margin. It varies alio in Ihape; fome are nearly 

 as long as they are broad ; others extend at the anterior 

 end, and become more pointed, but in all the front mar- 

 gin is confiderably more rounded than in the Virgmea. 

 Infide yellowiOi-white ; margin ^lain; valves concave: 

 hinge furnifhed with three teeth in each valve, the middle 

 one a little bifid. Length commonly about one inch; 

 breadth an inch and three-eighths. 



This fpecies has fometimes been confounded with the 

 Virginca, but may be readily known, not only by its in- 

 ferior fize, different colour and markings, but by its being 

 more convex, the ftrije much finer, and the front margin 

 more rounded; befides which it is always longer in pro- 

 portion to the breadth. 



Lister has given a very good figure of this fliell, and 

 has marked it as an EugliJJi fpecies. It was known alfo 

 to Do61or SoLANDER, and was called in the Mvfeum 

 Porilandicum bv the name of ncbidoja, which name was 

 retained by Do6tor Pulteney in his catalogue of Dor- 

 fetfiire fliells, who fays it is found on that coaft; indeed 

 we obferved it on Siudland beach. 



it is verv common amonCTft the fand taken from Fal~ 



mouth 



