A couple come to mind:

A H Fox HE (Super Fox)32", PG, appx 9lbs
A H Fox Sterlingworth Wildfowler, 32", PG appx 9lbs
Ithaca Flues Grade 2, 32" F/F, Straigth Grip, 3 position safey
Ithaca Minear Grade 5, 32" F/F Damascus, Pistol Grip, 3 position safety

In reality, I wouldn't want any of these laying in a jonboat, so I would go with the Fox model b or stevens 311,

Merry Christmas to all and God Bless

Dogs On Point!!! - doublenut