PLATE VIII. 



because, like that species, it is imperforated, and has a prominent 

 ridge on the whirls. Pennant says, it is scarcely distinct from T. Zizy- 

 phinus. Da Costa thinks it certainly a distinct species. 



If the shell, Fig. 104. Pennant, is correct, it is of a larger grgwth 

 than any of our specimens. Da Costa says, the size seldom exceeds 

 that of a cherry kernel. Not uncommon on the shores of Sussex j 

 and has been received from the coast of Devonshire. 



Fig. II. natiural fize. Fig. III. magnified. 



