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American zoological, botanical and geological bibliography, for the year 1851 : (From the Americ. Journ. of Sc. and Arts, See. Ser., Vol. XIII)
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Essay on the Classification of Nemertes and Planariae: preceded by some general considerations on the primary divisions of the animal Kingdom
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Descriptions of new species of reptiles, collected by the U. S. exploring Expedition under the command of Capt. Ch. Wilkes, U. S. V. : Second part.- Including the species of Batrachians, exotic to...
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Bibliographia Americana historico-naturalis; or bibliography of american natural history for the year 1851