In short, it reminds one of Bardolph's face—'all bubukles and whelks and knobs.'
The dye-producing power is not restricted to the whelks, but is shared by other Molluscs.
It is not the least like cockles, or whelks, or any shell she ever saw.
For food he ate the whelks, mussels, and oysters that were so abundant on the shore.
But no broken-down hunter had ever so many sprung ...