BLATT ®: Vill. 
because, like that species, it is imperforated, and has a prominent 
ridge on the whirls. Pennant says, it is scarcely distinct from 7’, Zizy- 
phinus. Da Costa thinks it certainly a distinct species. 
If the shell, Fig. 104. Pennant, is correct, it is of a larger growth 
than any of our specimens. Da Costa says, the size seldom exceeds 
that of a cherry kernel. Not uncommon on the shores of Sussex; 
and has been received from the coast of Devonshire. 
Fig. II. natural fize. Fig. II]. magnified. 
