235 



for 1851. By Charles Girard. 8vo. Pamph. 1852. New 

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Illustrations of the Birds of California, &c. by John Cassin and 

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F. A. G. Miguel, Oratio de Regno Vegetabili, &c. 4to 

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Synopsis of the Family of Naiades. By Isaac Lea. 4to. Phi 

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Gelehrte Anzeigen. Vols. 32, 33. 4to. Munchen, 1851 

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Annual Report of the Trustees of the State Library. 8vo 

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Trial of the Action of E. Desor v. C. H. Davis. 8vo. Pamph 

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De Candolle, Prodromus Systematis Naturalis Regni Vegeta 

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On a Fossil Saurian of the New Red Sandstone Formation of 

 Pennsylvania. By Isaac Lea. 4to. Pamph. Philadelphia, 

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On the Fossil Footmarks of the Red Sandstone of Pottsville, 

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 1852. Fro7n the Author. 



Observations on the Genus Unio. By Isaac Lea. Vol. V. 

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Proceedings of the Academy of Natural Sciences of Philadel- 

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Proceedings of the American Philosophical Society. Vol. V. 

 No. 47, pp. 211-244. 8vo. Pamph. Philadelphia, 1852. 

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Transactions of the American Philosophical Society. Vol. X. 

 Part 2. 4to. Pamph. Philadelphia, 1852. From the American 

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Journal d'Agriculture. Transactions de la Societe d'Agricul- 

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