031305, 031918, 032501, 170301, 250325, 270303, 270305 - Skeletons, skulls, and bones of fish, birds, reptiles, insects, dinosaurs. Shells, including sand dollars, nautilus, conch shells and scallop shells. Land-based dinosaurs and other prehistoric animals excluding flying prehistoric animals. Stones for jewelry (cut or uncut), nuggets of precious metal. Backgrounds covered with other figurative elements or repetitive designs, words or letters. Representations of animals or parts of animals forming letters or numerals, including punctuation. Representations of objects forming letters or numerals, including punctuation.