PLATE XLVI. 



Da Costa Obs. — Mr. Wallis, in his History of Northumberland, 

 p. 396. No. 9. notes a sort of this shell he calls the Orange and 

 White Solen, found in Budle Sands -with this common sort, and in 

 all respects like it, except in colour., which is deep orange and 

 -white in transverse fillets, in alternate variegations. Sucre, if a 

 distinct species, or only a variety ? 



D 2 



