1848 · Best.-Nr. QJZ-29 — Grands formats (environ 33,2 x 24,5 cm), lot de 4 articles ; 1er article (août 1848) : Observations on the Eocene formation, and descriptions of one hundred and five new fossils of that period, from the vicinity of Vicksburg, Mississippi; with an appendix, 24 pages (numérotées 111 à 134), 4 planches (numérotées 11 à 14) ; 2e article (août 1849) : Descriptions of New Fossil and Recent Shells of the United States, 3 pages (numérotées 207 à 209) ; 3e article (août 1849) : Notes on Shells, with descriptions of new genera and species, 5 pages (numérotées 210 à 214) ; 4e article (janvier 1850) : Descriptions of New Fresh Water and Marine Shells, 6 pages (numérotées 275 à 280), 3 planches (numérotées 37 à 39). Quatre articles complets sous couvertures papier, extraits du Journal of the Academy of Natural Sciences of Philadelphia, 2ème Series, vol. 1, parts 2, 3 et 4. Pages et planches montées sur onglets. Articles rares décrivant des mollusques (coquillages) récents et fossiles des Etats-Unis accompagnés de 7 magnifiques planches – Large format (about 33.2 x 24.5 cm), lot of 4 articles ; 1st article (August 1848): Observations on the Eocene formation, and descriptions of one hundred and five new fossils of that period, from the vicinity of Vicksburg, Mississippi; with an appendix, 24 pages (numbered 111 to 134), 4 plates (numbered 11 to 14) ; 2nd article (August 1849): Descriptions of New Fossil and Recent Shells of the United States, 3 pages (numbered 207 to 209); 3rd article (August 1849): Notes on Shells, with descriptions of new genera and species, 5 pages (numbered 210 to 214); 4th article (January 1850): Descriptions of New Fresh Water and Marine Shells, 6 pages (numbered 275 to 280), 3 plates (numbered 37 to 39). Four complete articles (bound in three), plain new wrappers, extracted from the Journal of the Academy of Natural Sciences of Philadelphia, 2nd Series, vol. 1, parts 2, 3 and 4. Rare articles describing living and fossil molluscs (shells) from the United States with a total of 7 nice plates, by Timothy Abbott Conrad (1803-1877), the father of American conchology
