. Smithsonian miscellaneous collections . > 17 --4^^ v 18 20 \. 22 23 .lM-K^:j Trilobites (See explanation of plates at end of text.) SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 119, NO. 1, PL. 23.

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Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience