I think I put this one verse into a tune-of-John Brown's Body thread:
Mary Ann McCarthy she went out to dig some clams (3x)
But she didn't get a solitary clam.
CHO: All that Mary got was oysters (3x)
      But she didn't get a solitary clam (not one).

and a verse to No Bugs on Me that ends
There maybe lobsters on some of you mobsters,
But there aint...
Carter