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1825. 



EoBiNSON, Samuel. A Catalogue of American Minerals, with their 

 localities. Boston, 1835. 



Van Kensselaer, Jer. Lectures on Geology; being outlines of 

 the science, delivered in the New York Atheneum in the year 1835. 

 8vo. pp. 358. New York, 1835. 



1836. 



Pierce, James. Practical remarks on the shell marl region of the 

 eastern parts of Virginia and Maryland, and upon the bituminous coal 

 formations of Virginia and the contiguous region. 



Amer. Jour. Sci., vol. xi, 1826, pp. 54-59. 



1838. 



Vanuxem, L., and Morton, S. G. Geological Observations on Sec- 

 ondary, Tertiary, and Alluvial formations of the Atlantic coast of the 

 United States arranged from the notes of Lardner Vanuxem. (Read 

 Jan., 1828.) 



Jour. Acad. Nat. Sci., Phila., vol. vi, 1st ser., 1828, pp. 59-71. 



1829. 



Morton, S. G. Description of two new species of Fossil Shells of 

 the genus Scapphites and Crepidula: with some observations on the 

 Ferruginous Sand, Plastic Clay, and Upper Marine Formations of the 

 United States. (Read June 17, 1828.) 



Jour. Acad. Nat. Sci., Phila., vol. vi, 1st ser., 1829, pp. 107-119. 



1830. 



Conrad, T. A. On the Geology and Organic Remains of a part of 



the Peninsula of Maryland. 



Jour. Acad. Nat. Sci., Phila., vol. vi, 1st ser., 1830, pp. 205-230, with two 

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Morton, Samuel G. Synopsis of the Organic Remains of the Fer- 

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1831. 



Conrad, Timothy A. Description of Fifteen New Species of Recent 

 and Three of Fossil Shells, chiefly from the Coast of the U. S. 

 Jour. Acad. Nat. Sci., Phila., vol. vi, 1st ser., 1831, pp. 256-268, plate. 



