walcott.] LITERATURE. 31 



Jackson, C. T. [On a trilobite from Braiutree.] Boston Soc. Nat. Hist., Proc, vol. 



7, 1859, p. 54. 



Meek, F. B., and F. V. Hayden. [Some remarks on the geology of the Black Hills 

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Salter, J. W. On the fossils of the lingula-flags or "zone primordiale." Quar. 

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Shumard, B. F. Letter touching the late discovery of Lower Silurian rocks, equiva- 

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1860. 



Barrande, J. Trilobiten der Primordial- Faun a in Massachusetts. Neues Jahrb., fur 

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Billings, E. On some new species of fossils from the limestone near Point Levi, 

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[Review of] Acadian Geology, and a Supplementary Chapter thereto. Cana- 

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Bradley, F. H. Description of a New Trilobite from the Potsdam Sandstone. Am. 

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Dawson, J. W. Supplementary Chapter to Acadian Geology, Edinburgh, 1860, pp. 70. 



Hall, James. Note upon the trilobites of the shales of the Hudson River group, in 

 the town of Georgia, Vt. Thirteenth Ann. Rep. State Cab. Nat. Hist., 1860, 

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Logan, Sir W. E. On the track of an animal lately found in the Potsdam forma- 

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Marcou, Jules ; Joachim Barrande and. On the Primordial fauna and the Taconic 

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Tyson, Philip T. First Report of the State Agricultural Chemist of Maryland. 

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1861. 



Barrande, J. Documents anciens et nouveaux sur la faune primordiale et le systeme 

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Billings, E. On the Age of the Red Sandstone Formation of Vermont. Am. Jour. 

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Hall, James. On the Primordial fauna and Point Levi fossils. Am. Jour. Sci., 2d 

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Report of the Superintendent of the Geological Survey [of Wisconsin] Ex- 

 hibiting the progress of the work. January 1, 1861. Madison, 1861, pp. 52. 



Correction for the 13th Annual Report. Fourteenth Ann. Rep. State Cab. 



Nat. Hist., 1861, p. 110. 



Hayden, F. V. Sketch of the geology of the country about the headwaters of the 

 Missouri and Yellowstone rivers. Am. Jour. Sci., 2d ser., vol. 31, 1861, pp. 

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HitchcOck, C. H. Hypozoic and Paleozoic rocks. Report on the geology of Ver- 

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[On the Geology of Vermont, chiefly in connection with the Taconic system.] 



Boston Soc. Nat. Hist., Proc, vol. 7, 1861, pp. 426, 427. 



General Report on the Geology of Maine. Prelim. Rep. on the Natural His- 

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Hunt, T. Sterry. On some points in American geology. Am. Jour. Sci., 2d ser., 

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Jackson, C. T. [On a trilobite from Braintree.] Boston Soc. Nat. Hist., Proc, vol. 



8, 1861, p. 58. 



Logan, W.E. Remarks on the fauna of the Quebec group of rocks and the Primordial 

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 la faune des roches du groupe de Quebec et sur la zone primordiale du Ca- 

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Marcou, Jules. The Taconic and Lower Silurian rocks of Vermont and Canada, 

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