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1850. Philippi, Zeitschrift fiir Malakozoologie, VII. 



1850. Gould, TTnited States Exploring Expedition, Report on the Mollusca. 



1850. CJouId, Proceedings of the Boston Society of Natural History, III. 



1851. Recluz, Journal de Conchyliologie, I. 

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1851. Sowerby, Thesaurus Conchyliorum, II, Monograi)h of Cytherea. 

 1851. Philippi, Zeitschrift fiir Malakozoologie, VIII. 

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1851. Morelet, Testacea Novissima insulpe Cubanpe et America centralis, II. 



1852. D'Orbigny, Prodrome de Paleontologie, III. 

 1852. Recluz, Journal de Conchyliologie, III. 



1852. Jay, Catalogue of Shells, fourth edition, supplement. 



1852. Gould, Boston Journal of Natural History, VI, Art. XXIV. 



1852. Sowerby, Thesaurus Conchyliorum, II, Monograph of Artemis. 



1852. C. B. Adams, Contributions to Conchology. 



1852. C. B. Adams, Catalogue of shells collected at Panama. 



1852. Leach, Synopsis of the Mollusca of Great Britain, edited l)y Gray. 



1852. Recluz, Journal de Conchyliologie, III. 



1853. Searles Wood, Crag Mollusca, II, Bivalvia. 



1853. Philippi, Handbuch der Conchyliologie und der Malakozoologie. 



1853. Woodward, Manual of Recent and Fossil Shells (1851-1856). 



1853. Conrad, Proceedings Academy of Natural Sciences of Philadeljihia, lirst series, 



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1853. Sowerby, Thesaurus Conchyliorum II, Monograph of Venus. 



1854. Huppe, (in) Gay, Historia de Chile, VIII, Moluscos. 

 1854. Huppe, Revue et Magazin de Zoologie. 



1854. Conrad, Proceedings, Academy of Natural Sciences of Philadelphia, VII. 



1855. Conrad. See Gould, 1855. 



1855. Carpenter, Proceedings of the Zoological Society. 



1855. Toumey and Holmes, Pleiocene Fossils of South Carolina (1855-1858). 



1855. Arthur Adams, Proceedings of the Zoological Society. 



1855. Gould and Conrad, Pacific Railroad Reports, and appendix. 



1856. Carpenter, Proceedings of the Zoological Society. 

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1856. Tuomey and Holmes, Pleiocene Fossils of South Carolina. 



1857. Carpenter, Report on the Mollusca of the West Coast of America, in Report 



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 1857. Deshayes, Journal de Conchyliologie, VI. 



1857. Dunker. See Romer, 1857. 



1858. Jeffreys, Annals and Magazine of Natural History, XL 



1858. Beau, Catalogue des Coquilles de Guadeloupe, par P. Fischer. 

 1858. Holmes, Postpleiocene Fossils of South Carolina. 



