PLATE CXIT. 



This species is admitted as a British shell upon the authority of 

 Dr. Lister, who says he had purchased them of the Scarborough 

 fishermen. Dr. Lister had not seen any of them alive, and concludes 

 it must be a pelagian shell, or one of those which live far from the 

 shores. 



As Pennant had inserted this species in his British Zoology, upon 

 this authority, Da Costa was unwilling to omit it in his British 

 Conchology , yet he observes, that it is not improbable Dr. Lister 

 was imposed upon by the fishermen, for the shell is generally believed 

 to be a native of the East Indies ; some consider it as a West-Indian, 

 and others as an European species* 



