30 CONCHYLIA— D7THyiL4. 7. 



Turton, Conch. Diet. p. 245. 

 Mus. nost. From rocks at Teignmouth and Torbay. 



Shell nearly an inch long, and more then two and a half broad, 

 brownish or yellowish white, with sometimes a few purple broken 

 rays and zig-zag lines, generally of an oblong shape angularly 

 truncate at one end, sometimes rounded at both ends, or kidney- 

 shaped and indented : beaks nearer one end, a little prominent and 

 recurved, without any distinct heart-shaped impression under them : 

 inside white, glossy, with mostly a purple blotch at the larger end : 

 the margin plain : hinge with three erect long and somewhat re- 

 curved teeth in each valve, two of them cloven; the lower one in 

 the right valve, and the upper one in the left valve plain and much 

 smaller than the others. 



The young shells are flattish, white variously marked with purple 

 blotches at the anterior end, and may be easily mistaken for the 

 young of Venus pullastra ; but besides the differenee of the teeth, 

 the latter are much more angular, and rough at the anterior end. 



8. UYA.—LINNE. 



Testa transversa, cequivalvis, lateribus hiantibus. Cardo valv(S sinistrce 

 dente elevato transversim dilatato, valvd dextrd muticd : lateralibus 

 nullis. Ligamentum internum. 



