MARYLAND GEOLOGICAL SURVEY 41 



1832. 



Conrad, T. A. Fossil Shells of the Tertiary Formations of North 

 America illustrated by figures drawn on Stone from Nature. Phila. 

 46 pp. [vol. i, pt. 1-2 (1832), 3-4 (1833)]. 



(Repub.) by G. D. Harris, Washington, 1893. 



(Part 3 was republished with plates, March 1, 1835.) 



1834. 

 Ducatel, J. T., and Alexander, J. H. Report on the Projected 

 Survey of the State of Maryland, pursuant to a resolution of the Gen- 

 eral Assembly. 8vo. 39 pp. Annapolis, 1834. Map. 



Md. House of Delegates, Dec. Sess., 1833, 8vo, 39 pp. 

 Another edition, Annapolis, 1834, 8vo, 58 pp., and map. 

 Another edition, Annapolis, 1834, 8vo, 43 pp., and folded table. 

 Amer. Jour. Sci., vol. xxvii, 1835, pp. 1-38. 



1835. 

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

 Eegion. 



Trans. Geol. Soc, Pa., vol. i. part 2, 1835, pp. 335-341. 



Observations on the Tertiary Strata of the Atlantic coast. 



Amer. Jour. Sci., vol. xxviii, 1835, pp. 104-111, 280-282. 



Ducatel, J. T. Geologist's report, 1834. 



Another edition. Eeport of the Geologist to the Legislature 



of Maryland, 1834, n. d. 8vo, 50 pp. 2 maps and folded tables. 



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

 Maryland, 1834, [Annapolis] n. d. 8vo, 59, i, pp. Two maps and one 

 folded table. 



Md. House of Delegates, Dec. Sess., 1834. 



1836. 

 EoGERS, Wm. B. Eeport of the Geological Eeconnoissance of the State 

 of Virginia. Wm. B. Eogers. Phila., 1836. 143 pp. Plate. 



1837. 



Ducatel, J. T. Outline of the Physical Geography of Maryland, 



embracing its prominent Geological Features. 



Trans. Md. Acad. Sci. and Lit., vol. i, 1837, pp. 24-54, with map. 

 4 



