Spirifer Mollusk Small 320×221 Medium 640×442 Large 1024×707 Download TIFF Original 2400×1656 | (1.9 MB) Description An ancient mollusk from the Carboniferous Age, the Spirifer cameratus. Keywords ancient mollusk, Brachiopod, Carboniferous Age, early life form, fossil, Paleozoic, Spirifer cameratus Galleries Other Mollusks Source: Dana, James D. New Text-Book of Geology (New York: Ivison, Blakeman & Company, 1883) 255