44 THE PHYSICAL FEATURES OF CALVERT COUNTY 



1860. 



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

 Chemist, to the House of Delegates of Maryland, Jan. 1860. 8vo. 145 

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



1861. 



Conrad, T. A. Fossils of the (Medial Tertiary or) Miocene Forma- 

 tion of the United States. Ko. 4. 1861 (?). pp. 81-89, index and 

 plates xlv-xlix. 



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



Tyson, P. T. [Letter from Mr. Tyson of Maryland on Tripoli.] 

 (Read Dec, 1860.) 



Proc. Acad. Nat. Sci., Phila., vol. xii, 1861, pp. 550-551. 



1862. 



Conrad, T. A. Catalogue of the Miocene Shells of the Atlantic 

 Slope. 



Proc. Acad. Nat. Sci., Phila., vol. xiv, 1862, pp. 559-582. 



Tyson, Philip T. Second Eeport of Philip T. Tyson, State Agricul- 

 tural Chemist, to the House of Delegates of Maryland, Jan. 1862. 8vo. 

 92 pp. Annapolis, 1862. 



Md. Sen. Doc. [F]. 



1864. 



Meek, F. B. Check list of the Invertebrate Fossils of North America. 

 Miocene. 



Smith. Misc. Col., vol. vii, art. vii, 1864, 32 pp. 



1866. 



Conrad, T. A. Illustrations of Miocene Fossils, w-ith Descriptions of 

 ISTew Species. 



Amer. Jour. Conch., vol. ii, 1866, pp. 65-74, plates 3 and 4. 



1867. 



Conrad, T. A. Descriptions of New Genera and Species of Miocene 

 shells, with notes on other fossil and recent species. 

 Amer. Jour. Conch., vol. iii, 1867, pp. 257-270. 



