58 Introduction 



RoGEES, Henry D. The geology of Pennsylvania, a Government 

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 of North America and Great Britain. 4to, vol. i, 586 + xxviii pp.; vol. ii, 

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1860 



Tyson, Philip T. Mrst Report of Philip T. Tyson, State Agricultural 

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Md. Sen. Doc. [E]. 



Md. House Doc. [C]. 



Hall, James. Palieontology, vol. iii. Containing descriptions and 

 figures of the organic remains of the Lower Helderberg group and the 

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Geol. Survey of New York, Albany, 4to, pt. i, text, 1859, 533 -f- xii pp.; pt. ii, 

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. Descriptions of new species of fossils, from the Hamilton 



group of western New York, with notices of others from the same horizon 

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1862 



Hall, James. Contributions to Palaeontology ; comprising descriptions 

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15th Ann. Rept. Regents Univ. of New York on the Condition of the State Cab. 

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1867 



Hall, James. Palaeontology, vol. iv, part i. Containing descriptions 

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Geol. Survey of New York, Albany, 1867, 4to, 427 pp., 63 plates. 



