- Proceedings of the Academy of Natural Sciences of Philadelphia. Volume 5. 1850-1851. [Complete].

Philadelphia, PA, The Academy of Natural Sciences of Philadelphia, 1850-1851. In 13 parts. 8vo (25.0 x 15.5 cm). x, 362, [13] pp.; 13 lithographed plates; several text figures. Sewn. No wrappers issued. = The ANSP Proceedings were the foremost zoological journal in the U.S.A., being especially strong in Mollusca, ornithology and regional palaeontology. Authors include John Cassin, with a paper on new birds with 12 plates, and a Catalogue of the Caprimulgidae in the collection of the Academy of Natural Sciences of Philadelphia, with a title page and 13 unnumbered text pages. Malacological writers include Timothy Conrad, and Isaac Lea. A very good, complete issue. Rare.

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