RMRG7WM6–. Bulletin - United States National Museum. Science. U. S. NATIONAL MUSEUM BULLETIN 97 PLATE 105. PERCNON GIBBESI. (PAGE 337.) For explanation of plate see page 439.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.