BESC U I PTION. 123 



Specimen white, marked with bluish flesh-co- 

 loured streaks and spots, striated transversely in 

 such a manner as that towards the anterior side the 

 shell appears divided into two triangular compart- 

 ments following the curvature of the lower mar- 

 gin ; covered with a yellowish olive transparent 

 epidermis. 



Inhabits the English coast. 



Fig. 5. S. radlatus. 



Shell oblong oval, straight, smooth, with an in- 

 ternal rib from the hinge to the base. 



Lister Conch, tab. 422. fig. 266. 



Specimen violet with four white rays, extremely 

 thin and brittle, rib white, strong ; hinge iu both 

 valves callous ; teeth in both valves bifid. 



Inhabits the East Indies. 



PLATE V. 

 Fig. I. Hinge of Tellina radiata. 



Fig. 2. Tellina rugosa. 



Sliell ovate, with transverse undulated wrinkles; 



