General guide to the exhibition halls of the American Museum of Natural History . r ... ^urf,. FOSSIL BRACHIOPODS OF THE SILURIANAGE. Primitive shelled creatures somewhat re-sembling clams externally but not related tothem A FOSSIL INVERTEBRATE OF ANCIENT SEAS. (Below) A well-preserved crinoid, or sea- lilv. a flower like animal related to modern star-fishes I J til

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Keywords: ., bookcentury1900, bookdecade191, booksubjectnaturalhistorymuseums