44 The Upper Cretaceous Deposits of Maryland 



Conrad, T. A. Descriptions of New Fossil shells of the United States. 

 Jour. Acad. Nat. Sci. Phila., 2d ser., vol. ii, 1853, pp. 273-276. 



1859 



Gabb, W. M. Description of some new Species of Cretaceous Fossils. 

 Jour. Acad. Nat. Sci. Phila., 2nd ser., vol. iv, 1858-1860, pp. 290-305. 

 Refers to several fossils from Delaware and Chesapeake Canal, pp. 300, 302, 

 303. 



1860 



Tyson. P. T. First Report of Philip T. Tyson, State Agricultural 

 Chemist, to the House of Delegates of Maryland, Jan., 1860. 8vo. 

 11.") pp. Annapolis, 1860. Maps. 



Md. Sen. Doc. [E]. Md. House Doc. [C]. 



1865 



Conrad, T. A. Obesrvations on the Eocene Lignite Formation of the 

 United States. 



Proc. Acad. Nat. Sci. Phila., vol. xvii, 1865, pp. 70-73. 

 (Abst.) Amer. Jour. Sci., 2d ser., vol. xl, 1865, pp. 265-268. 



1873 



Anon. Geology of Maryland. 



New Topographic Atlas of Maryland by Martenet, Walling and Gray, Balti- 

 more, 1873, pp. 12-16. 



1874 



Hagen, H. A. On Amber in North America. 

 Proc. Boston Soc. Nat. Hist., vol. xvi, 1874, pp. 296-301. 



1884 

 Chester, Frederick D. Preliminary notes on the Geology of Dela- 

 ware — Laurentian, Palezoic, and Cretaceous Areas. 

 Proc. Acad. Nat. Sci. Phila., vol. xxxiv, 1884, pp. 237-259. 



Livermore and Dexter. [A collection of fossil earths, and minerals 

 from the deep cut of the Delaware and Chesapeake Canal, with memoir 

 and profile of geological strata developed in progress of work, presented 

 on July 17, 1829.] 



From Proc. Amer. Phil. Soc, 1743-1838. 



Proc. Amer. Phil. Soc, vol. xxii (2), 1884, p. 594. 



