Heat oven to 375°F In medium bowl, mix cream cheese, mayonnaise and horseradish until creamy. Stir in onion, lemon juice and crabmeat until well blended.
Unroll 1 can of the dough; separate into 4 rectangles. Press each into 8x4-inch rectangle, firmly pressing perforations to seal. With pizza cutter, cut each into 8 squares. Spoon about 1 rounded measuring teaspoon crab mixture onto center of each square.
Unroll second can of dough; separate into 4 rectangles. Press or roll each into 8x4-inch rectangle, firmly pressing perforations to seal. Cut each into 8 squares. Place squares on top of crab mixture. Press edges with fork to seal; place on ungreased cookie sheets.
Bake at 375°F for 10 to 14 minutes or until golden brown. Remove from oven. Sprinkle each with paprika and parsley; remove from cookie sheet. Serve warm.