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1827. Bruwn, Illustrations of the Eecent Conchology of (ireat Britain. 



1828. Basterot, Bulletin, Soci^te Linn^enne de Bordeaux, IT. 



1828. Menke, Verzeichniss Conchyliensaninilung, erste Ausgahe. 



1829. Bang, Manuel de I'histoire naturelle des mollusques. 

 1829. Defrance, Dictionnaire des Sciences Naturelles, LVIII. 

 1829. Sowerby, Zoological Journal, Y. 



1829. Broderip, Zoological Journal, V. 



1830. Menke, Synopsis Molluscorum in Museo Menkeano, second ('<litiuii. 



1830. Deshayes, Encyplopedie Methodique, Vers, Part 1. 



1831. Conrad, Journal Academy of Natural Sciences of Philadelphia, \'I. 

 1831. Sowerby, Genera of Recent and Fossil Shells, XXXIII. 



1831. Say, American Conchology, Part III. 



1832. Deshayes, Encyclopedic Methodique, Parts II and III. 

 1832. Lesson, Centurie Zoologique. 



1832. Conrad, Fossils of the Tertiary Formation, I. 



1833. Valenciennes, in Humboldt and Bonpland, Recncil d'observations en Am^- 



rique, II. 

 1833. Conrad, American Journal of Science, XXIII, Xo. 2. 

 1833. Brown, Zoologist's Text-book. 

 1833. Lea, Contributions to Geology. 



1833. Gray, in GrifHth and Pidgeon, The Animal Kingdom, XII, Mollusca and 



Radiata. 

 J 834. Conrad, Journal Academy of Natural Sciences of Philadelphia, first series, VII. 



1834. Sowerby, Genera of Recent and Fossil Shells, XLI. 



1834. INIorton, Synopsis of the Organic Remains of the ('retaceous Grouj) of the 



United States. 

 1834. Totten, American Journal of Science, first series, XX^'I. 



1834. Ravenel, Catalogue of the Ravenel Collection of Shells. 



1835. Swainson, Elements of Modern Conchology. 

 1835. Sowerby, Proceedings of the Zoological Society. 



1835. Broderip, Proceedings of the Zoological Society. 



1836. Philippi, Enumeratio Molluscorum Siciliie, I. 



1836. Rogers, Transactions of the American Philosophical Society, second series, ^'. 



1837. Conrad, Journal Academy of Natural Sciences, Philadelphia, VII. 



1837. Anton, Archiv fiir Naturgeschichte, I. 



1838. Bronn, Lethsea geognostica. 



1838. Wagner, Journal Academy of Natural Sciences, Philadelphia, VIII. 

 1838. Gray, The Analyst, VIII, No. XXIV, pages 302 to 309. 



1838. Conrad, Fossils of the Medial Tertiary of the United States, No. 1 . 



1839. Sowerby (and Gray), Zoology of Beechey's Voyage to Bering Strait. 

 1839. Sowerby, Conchological Manual, first edition. 



1839. D'Orbigny, Mollusques (etc.) recueilles aux iles Canaries par Barker- V.'ebb 



et Berthelot. 

 1839. Anton, Verzeichniss der Conchy liensamndung. 

 1839. Brown, Conch ologist's Text-book, fourth edition. 



1839. Deshayes, Revue Zoologique, Societe (\ivierienne. 



1840. Swainson, Malacology. 



1841. Goldfuss, Petrefacta Germania?, II. 



1841. Delessert, Recueil des Coquilles non figurees. 

 1841. Gould, Invertebrata of Massachusetts, first edition. 



1841. Conrad, American Journal of Science, XLI, October. 



1842. Gould, Proceedings Boston Society of Natural History, I. 

 1842. Sowerby, Conchological INIaaual, second edition. 



1842. H. C. Lea, American Journal of Science, first series, XLIII. 



