WASH CLAMS WELL TO REMOVE GRIT AND STEAM THEM IN JUST ENOUGH WATER TO COVER. REMOVE THEM AND GRIND THE MEATS, SAVING THE SHELLS. SAUTE ONIONS AND LINGUISA IN BUTTER UNTIL ONION IS SOFT. BLEND FLOUR, AND SEASONINGS, STIRRING WELL. ADD THE GROUND CLAMS; STIR, COOKINGF UNTIL THE FLOUR THICKENS. SET ASIDE. MIX BREADCRUMBS W/1/2 C. MELTED BUTTER. BUTTER CLAM SHELLS AND FILL W/CLAM MIXTURE. TOP W/BREAD CRUMBS. SPRINKLE W/PAPARIKA AND DOT W/BUTTER. BAKE AT 400 FOR 10-15 MIN.