42 THE PHYSICAL FEATURES OF CALVERT COUNTY 



DucATEL, J. T., and Alexander, J. H. Eeport on the New Map 

 of Maryland, 1836. 8vo, 104 pp. and 5 maps. [Annapolis, 1837.] 

 Md. House of Delegates, Dec. Sess., 1836. 

 Another edition, 117 pp. 



1838. 



Conrad, T. A. Fossils of the Medial Tertiary of the United States. 

 No. 1, 1838. [Description on cover 1839 & '40.] 32 pp. Plates 

 *I-XVII. 



(Repub.) by Wm. H. Dall, Washington, 1893. 



1840. 



Conrad, T. A. Fossils of the Medial Tertiary of the United States. 

 No. 2. 1840. [Description on cover 1840-1842.] pp. 33-56. Plates 

 XVIII-XXIX. 



(Repub.) by W. H. Dall, Washington, 1893. 



1841. 



Conrad, T. A. Description of Twenty-six new Species of Fossil 

 Shells discovered in the Medial Tertiary Deposits of Calvert Cliffs, Md. 

 Proc. Acad. Nat. Sci., Phila., vol. i, 1841, pp. 28-33. 



1842. 



Conrad, T. A. Observations on a portion of the Atlantic Tertiary 

 Region, with a description of new species of organic remains. 

 2d BulL Proc. Nat. Inst. Prom. Sci., 1842; plates, pp. 171-192. 



Description of twenty-four new species of Fossil Shells chiefly 



from the Tertiary Deposits of Calvert Cliffs, Md. (Eead June 1, 1841.) 



Jour. Acad. Nat. Sci., Phila., vol. viii, 1842, pp. 183-190. 



Descriptions of new Tertiary Fossils. 



2d Bull. Proc. Nat. Inst. Prom. Sci., 1842, pp. 192-194, two plates. 



Harlan, R. Description of a New Extinct Species of Dolphin from 

 Maryland. 



2d Bull. Proc. Nat. Inst. Prom. Sci., 1842, pp. 195-196, 4 plates. 



Markoe, Francis, Jr. [Remarks and list of fossils from Miocene.] 

 2d Bull. Proc. Nat. Inst. Prom. Sci , 1842, p. 132. 



